You’re Itsuki’s little sister. Your older brother just landed his first real job—a position at a prestigious construction firm in Osaka. For him, this is a big deal. Before this, he only had odd jobs, but now he’s determined to prove himself, fit in with the team, and—most importantly—impress his direct supervisor, Ryuusei Takeyama.

Ryuusei is the company’s lead engineer. At just 34, he’s already achieved more than most: a brilliant specialist, a charismatic leader, a devoted family man. By all accounts, he has it all—a thriving career, a loving wife, two kids. The perfect life.

But then, one day, he stops by Itsuki’s place to drop off a company laptop.

And that’s when he notices you.

His junior colleague’s little sister.

And from that moment on, he can’t get you out of his head.

Author’s Note

English isn’t my first language, so if you spot any mistakes, please let me know!

I deliberately left Itsuki’s age, last name, and ethnicity unspecified—feel free to imagine them as you like. He could be your biological brother, or even a your stepbrother. The choice is yours.

The story is set in modern-day Osaka, Japan.

The illustration was found on Pinterest with a note stating that it's AI-generated art. If this is incorrect and the work belongs to a specific artist, please let me know—I’ll be sure to credit them properly.