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      decimals="0"
      id="fid_794"
      unitRef="USD">3000</us-gaap:FiniteLivedIntangibleAssetsGross>
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      contextRef="AsOf2026-03-31"
      decimals="0"
      id="fid_791"
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      contextRef="AsOf2026-03-31"
      decimals="0"
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    <us-gaap:GoodwillAndIntangibleAssetsIntangibleAssetsPolicy contextRef="From2025-10-01to2026-03-31" id="fid_355">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;Finite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives. The Company amortizes the website cost over five years, with amortization calculated and recorded monthly. This results in a monthly amortization expense of $50, recognized in the Statement of Operations. The Company periodically reviews the estimated useful lives and amortization methods to ensure they remain appropriate and reflect the assets&#x2019; expected consumption of economic benefits.&lt;/p&gt;</us-gaap:GoodwillAndIntangibleAssetsIntangibleAssetsPolicy>
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      contextRef="From2025-10-01to2026-03-31"
      decimals="0"
      id="fid_795"
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    <us-gaap:RevenueRecognitionPolicyTextBlock contextRef="From2025-10-01to2026-03-31" id="fid_356">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;The Company recognizes revenue in accordance with Accounting Standards Codification (ASC) 606 &#x2013; Revenue from Contracts with Customers. Under this standard, revenue is recognized when control of a promised good or service is transferred to the customer in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services.&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;The Company evaluates each contract to determine:&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;table cellpadding="0" style="border-spacing:0;text-align:justify;font:10pt times new roman;width:100%"&gt;&lt;tbody&gt;&lt;tr style="height:15px"&gt;&lt;td style="width:4%;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&#160;&lt;/p&gt;&lt;/td&gt;&lt;td style="width:4%;vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&lt;span style="font-family:symbol"&gt;&#xb7;&lt;/span&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;The existence of enforceable rights and obligations;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="height:15px"&gt;&lt;td&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&#160;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&lt;span style="font-family:symbol"&gt;&#xb7;&lt;/span&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;Whether performance obligations are satisfied over time or at a point in time;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="height:15px"&gt;&lt;td&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&#160;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&lt;span style="font-family:symbol"&gt;&#xb7;&lt;/span&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;The appropriate transaction price;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="height:15px"&gt;&lt;td&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&#160;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&lt;span style="font-family:symbol"&gt;&#xb7;&lt;/span&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;Allocation of the transaction price to performance obligations; and&lt;/td&gt;&lt;/tr&gt;&lt;tr style="height:15px"&gt;&lt;td&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&#160;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&lt;span style="font-family:symbol"&gt;&#xb7;&lt;/span&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;The point at which control transfers to the customer.&lt;/td&gt;&lt;/tr&gt;&lt;/tbody&gt;&lt;/table&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&#160; &lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;For the six months ended March 31, 2026, the Company recognized revenue from architectural and design services upon completion and customer acceptance of the final deliverables in accordance with the contract terms. Prior to such acceptance, customer payments received under the Architectural and Design Services Contract dated October 10, 2025 were recorded as deferred revenue (contract liability), as the related performance obligations had not yet been satisfied. Upon satisfaction of the performance obligations and transfer of control to the customer, the related deferred revenue was recognized as revenue.&lt;/p&gt;</us-gaap:RevenueRecognitionPolicyTextBlock>
    <us-gaap:FairValueOfFinancialInstrumentsPolicy contextRef="From2025-10-01to2026-03-31" id="fid_358">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;Accounting Standards Codification (&#x201c;ASC&#x201d;) 825, &#x201c;Disclosures about Fair Value of Financial Instruments,&#x201d; requires the disclosure of fair value information for certain financial instruments. ASC 820, &#x201c;Fair Value Measurements,&#x201d; defines fair value, establishes a framework for measuring fair value in accordance with GAAP, and expands disclosures about fair value measurements. Fair value estimates discussed herein are based upon market assumptions and pertinent information available to management as of March 31, 2026.&lt;/p&gt;</us-gaap:FairValueOfFinancialInstrumentsPolicy>
    <us-gaap:EarningsPerSharePolicyTextBlock contextRef="From2025-10-01to2026-03-31" id="fid_359">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;The Company follows the guidance of ASC 260, &#x201c;Earnings Per Share,&#x201d; which governs the calculation, presentation, and disclosure of earnings (loss) per share for entities with publicly traded common stock.&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;Basic earnings (loss) per common share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding during the reporting period. Since the Company has no dilutive securities, diluted earnings (loss) per share is identical to basic earnings (loss) per share.&lt;/p&gt;</us-gaap:EarningsPerSharePolicyTextBlock>
    <oigi:RoundingPolicyTextBlock contextRef="From2025-10-01to2026-03-31" id="fid_360">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;All amounts in these financial statements are presented in U.S. dollars and rounded to the nearest dollar, unless otherwise indicated.&lt;/p&gt;</oigi:RoundingPolicyTextBlock>
    <us-gaap:RelatedPartyTransactionsDisclosureTextBlock contextRef="From2025-10-01to2026-03-31" id="fid_164">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&lt;strong&gt;NOTE 4 &#x2013; RELATED PARTY TRANSACTIONS&lt;/strong&gt;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;Since inception (December 7, 2023) and through March 31, 2026, the Company has relied on advances from its sole officer and director to fund operating and administrative activities. These advances represent payments made by the director on behalf of the Company to cover incorporation costs, professional service fees, and other general expenses. The advances are unsecured, non-interest bearing, and due on demand, and are intended to serve as short-term financing until the Company can generate sufficient operating cash flows, obtain equity financing, or secure external funding.&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;Since inception (December 7, 2023) and through March 31, 2026, the sole officer and director advanced a total of $6,515 to the Company. As of March 31, 2026, the entire balance remained outstanding and is presented as a current liability in the accompanying balance sheet.&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;There is no formal written agreement or continuing commitment from the director or any other related party to provide additional financial support, and no promissory note has been executed in connection with these advances.&lt;/p&gt;</us-gaap:RelatedPartyTransactionsDisclosureTextBlock>
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      contextRef="From2025-10-01to2026-03-31"
      decimals="0"
      id="fid_796"
      unitRef="USD">6515</us-gaap:ProceedsFromShortTermDebt>
    <us-gaap:StockholdersEquityNoteDisclosureTextBlock contextRef="From2025-10-01to2026-03-31" id="fid_502">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&lt;strong&gt;NOTE 5 &#x2013; STOCKHOLDERS&#x2019; EQUITY&lt;/strong&gt;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;As of March 31, 2026 and September 30, 2025, the Company had 3,197,375 and 3,060,875 shares of common stock issued and outstanding, respectively.&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;During the six months ended March 31, 2026, the Company issued 136,500 shares of common stock for gross proceeds of $5,460. Equity issuance costs of $210 were incurred in connection with the issuance, resulting in net proceeds of $5,250.&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;There were no changes to the Company&#x2019;s authorized shares, par value, or classes of stock during the period.&lt;/p&gt;</us-gaap:StockholdersEquityNoteDisclosureTextBlock>
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      contextRef="AsOf2026-03-31"
      decimals="0"
      id="fid_798"
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      contextRef="AsOf2025-09-30"
      decimals="0"
      id="fid_797"
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      contextRef="From2025-10-01to2026-03-31_oigi_CommonStocksMember"
      decimals="0"
      id="fid_801"
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    <oigi:ProceedsFromIssuanceOfCommonStockGross
      contextRef="From2025-10-01to2026-03-31_oigi_CommonStocksMember"
      decimals="0"
      id="fid_803"
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    <oigi:StockIssuanceCostsExpenses
      contextRef="From2025-10-01to2026-03-31_oigi_CommonStocksMember"
      decimals="0"
      id="fid_802"
      unitRef="USD">210</oigi:StockIssuanceCostsExpenses>
    <us-gaap:ProceedsFromIssuanceOfCommonStock
      contextRef="From2025-10-01to2026-03-31_oigi_CommonStocksMember"
      decimals="0"
      id="fid_804"
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    <us-gaap:IncomeTaxDisclosureTextBlock contextRef="From2025-10-01to2026-03-31" id="fid_168">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&lt;strong&gt;NOTE 6&#160;&#x2013; INCOME TAXES&lt;/strong&gt;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;The Company accounts for income taxes under the asset and liability method in accordance with ASC 740, Income Taxes. Deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial reporting bases and the tax bases of assets and liabilities.&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;For the six months ended March 31, 2026, the Company recorded no provision for income taxes. Although the Company reported pretax income for the period, management determined that no current income tax payable and no net deferred tax asset should be recognized as of March 31, 2026. As of March 31, 2026, the Company did not record a net deferred tax asset, as management determined that it is more-likely-than-not that any deferred tax assets would not be realized; accordingly, a valuation allowance would offset such deferred tax assets.&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;Management will continue to evaluate the Company&#x2019;s income tax position and the realizability of deferred tax assets in future periods.&lt;/p&gt;</us-gaap:IncomeTaxDisclosureTextBlock>
    <us-gaap:SubsequentEventsTextBlock contextRef="From2025-10-01to2026-03-31" id="fid_169">&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&lt;strong&gt;NOTE 7&#160;&#x2013; SUBSEQUENT EVENTS&lt;/strong&gt;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;&#160;&lt;/p&gt;&lt;p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;"&gt;The Company has evaluated subsequent events from March 31, 2026 to the date the financial statements were issued and has determined that there are no items to disclose.&lt;/p&gt;</us-gaap:SubsequentEventsTextBlock>
</xbrl>
