Won the Gold Prize at the 1st Shueisha Web Novel Grand Prix, and the book version is currently on sale from Dash X Bunko.

[Main story completed]

*Currently, side stories are being updated irregularly.

On that day, the beautiful girl who showed up to meet his online game friend turned out to be the stepdaughter of his father's new wife.

"I-I'm Philia..."

"No way...?"

Five years since the remarriage, they usually had no contact.

All he ever saw at home was her dowdy, unfashionable self.

Yet, standing before him was his stepsister, now a beautiful girl he almost didn't recognize.

Flustered by her drastic transformation, the offline meeting was ruined.

However, since they were to live under the same roof, his life with his stepsister—who had been reborn as a beautiful girl—would completely change.

Naturally, this change extended to his school life, involving the school's idol and his childhood friend, an active model, and then—

This is a story about gradually bridging the gap with that stepsister.

Thank you for #1 Daily and #1 Weekly in genre rankings.

R15 is a precaution.

Also started posting on Kakuyomu.