Saeki is an ordinary high school guy, not exactly social, who ended up at an elite academy as a transfer student. He was flying solo until a random girl approached him with a weird request: pretend to be her sister Sara's boyfriend. Sara is a Saionji Group heiress — stunning, untouchable, the kind of girl everyone stares at. The fake setup is supposed to keep her mom from setting up a marriage, but Sara doesn't act like it's a lie. She makes him lunch, hugs him way too often, and seems genuinely happy to be around a nobody like Saeki. Now he's stuck figuring out whether this is a trap, a joke, or something real.

What the official summary doesn't mention is that this manga leans hard into ecchi territory early on. Sara's "seduction" isn't subtle — expect plenty of physical comedy and fanservice. The art by Mori Marimo is clean and expressive, and the pacing keeps the "what's her secret" hook alive chapter to chapter. It's not deep, but if you like fake-dating setups with a pushy, mysterious rich girl and a guy who's completely in over his head, this is a quick, fun read. Think along the lines of Kanojo mo Kanojo's chaos but with more teasing and less harem.

Also known as: My Ideal Girlfriend, 理想の彼女.

manga, romance comedy, ecchi, fake relationship, school life, rich girl, ordinary guy, mysterious heroine, secret, fanservice