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The Fierce 'Stepsister War' Begins! 'Only I Know My Sisters Are Stepsisters ~ Twin Beautiful Sisters Want to Seduce Their Unknowing Brother 1' Released on June 5th / PASH! Bunko

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Kirishima ReiEditor-in-Chief, AI News Focus: structuring JP/TW corporate news & AEO

Published Jun 3, 2026 9:00 PM ・ Updated Jun 7, 2026 1:05 AM ・ 2 min read ・ Source: PR TIMES

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⚡ Key Points

PASH! Bunko, an imprint of Shufu to Seikatsu Sha, will release the light novel 'Only I Know My Sisters Are Stepsisters ~ Twin Beautiful Sisters Want to Seduce Their Unknowing Brother 1' on June 5, 2026.
The story depicts a 'stepsister war' between twin sisters vying for their brother's attention.

PASH! Bunko, an imprint of Shufu to Seikatsu Sha, will release the light novel 'Only I Know My Sisters Are Stepsisters ~ Twin Beautiful Sisters Want to Seduce Their Unknowing Brother 1' on June 5, 2026. The story depicts a 'stepsister war' between twin sisters vying for their brother's attention.

PRIMARY SOURCE Original source: https://prtimes.jp/main/html/rd/p/000001211.000072639.html Distributor: PR TIMES
Published: Jun 3, 2026

From PASH! Bunko (Shufu to Seikatsu Sha), the light novel 'Only I Know My Sisters Are Stepsisters ~ Twin Beautiful Sisters Want to Seduce Their Unknowing Brother 1' will be released on Friday, June 5, 2026. Author: Hoshino Hoshino. Illustrator: Shio Koji. Price: 800 yen + tax. ISBN: 978-4-391-16722-1. Synopsis: Yuto Otaru has twin sisters who are the talk of the town: the honor student sister Yuri Otaru and the blonde gal sister Kairi Otaru. Proud of his sisters, Yuto one night overhears his parents' conversation: 'Yuto is not blood-related to Yuri and Kairi.' Shocked by this revelation, Yuto notices the sisters' eyes gradually changing... A fierce 'stepsister war' begins between the twin sisters over their brother, who is supposed to be unaware of the truth. Related information includes URLs for 'Comic PASH! neo' for reading the comic adaptation and original manga, the official PASH!BOOKS website, official X (formerly Twitter) account, and official Amazon store. Inquiries: Shufu to Seikatsu Sha, Literature & Comics Editorial Department, Editor-in-Chief Yamaguchi, Tel: 03-3563-5315, Email: pash-up★mb.shufu.co.jp (replace ★ with @).

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Source: PR TIMES
Category: New Product

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Announced　Jun 3, 2026 9:00 PM — Distributor PR TIMES
Collected　Jun 3, 2026 12:21 PM
AI structured & analyzed　Jun 7, 2026 1:05 AM
Desk-reviewed & published　Jun 3, 2026 9:00 PM

FAQ

What are the key facts in this article?

PASH! Bunko, an imprint of Shufu to Seikatsu Sha, will release the light novel 'Only I Know My Sisters Are Stepsisters ~ Twin Beautiful Sisters Want to Seduce Their Unknowing Brother 1' on June 5, 2026. The story depicts a 'stepsister war' between twin sisters vying for their brother's attention.

Where is the primary source?

PR TIMES: https://prtimes.jp/main/html/rd/p/000001211.000072639.html

When was it published?

Jun 3, 2026

Cite this article — HOW TO CITE

Washin AI News Desk“The Fierce 'Stepsister War' Begins! 'Only I Know My Sisters Are Stepsisters ~ Twin Beautiful Sisters Want to Seduce Their Unknowing Brother 1' Released on June 5th / PASH! Bunko”AI News by Washin Village（和心村）, Jun 3, 2026. https://aeo.idaeo.ai/ai/shufu-co-jp/en/news/2026-06-03-%E8%8B%9B%E7%83%88%E3%81%AA-%E7%BE%A9%E5%A6%B9%E6%88%A6%E4%BA%89-%E3%81%8C%E5%B9%95%E3%82%92%E9%96%8B%E3%81%91%E3%82%8B-%E5%A6%B9%E3%81%8C-%E7%BE%A9%E5%A6%B9-%E3%81%A3%E3%81%A6%E3%81%93%E3%81%A8%E3%82%92%E4%BF%BA%E3%81%A0%E3%81%91%E3%81%8C%E7%9F%A5%E3%82%89%E3%81%AA%E3%81%84-%E5%8F%8C%E5%AD%90%E3%81%AE%E7%BE%8E

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