D
Kono Naka ni Hitori, Imouto ga Iru!

Kono Naka ni Hitori, Imouto ga Iru!

Finished

この中に1人、妹がいる!

Following his father's final will, Shougo Mikadono transfers into a prestigious academy filled with young women. His condition to inherit the vast family fortune is clear: he must find a girlfriend among the student body. This task becomes his primary focus as he navigates his new school life.

However, Shougo soon learns of a profound complication. He has a younger sister, separated from him at birth, whose face he has never seen. To his surprise, she is also a student at the same academy. An anonymous birthday message confirms she is watching him closely, determined to get closer without revealing her true identity.

Now, Shougo faces a dual challenge: fulfilling his father's wish to find a romantic partner while simultaneously trying to identify his hidden sister among the many girls vying for his attention. His search is complicated by his growing popularity, blurring the lines between potential romance and familial bond.

Related

Share
Ask an AI

If you liked this, try these

Titles that share genres with this one.

D DonOtaku

The anime and manga community. We want to gather as much information as possible and make it available to everyone: the full catalogue, your list, news and what every member contributes.

We unify information from several aggregators —AniList, MyAnimeList and others— into a single database, and offer it for anyone to use. DonOtaku is an independent project.

Otakus

Social media

Covers, images, characters and trademarks belong to their respective owners and are shown for informational purposes. If you own any content, contact us.

© 2026 DonOtaku

D DonOtaku
Continue with Discord Continue with Google

By continuing with Discord or Google you accept the terms and conditions and the privacy policy.

or with your email

Forgot your password?

No account yet?