Koshi Inuzuka is an Ordinary High School Student, handsome and intelligent with dreams of moving into the legal profession... but he's also a member of a martial arts family headed by his huge, muscular father, who persistently looks down upon his chosen path. Said father is very much pleased when Momoko Kuzuryu, the tiny, annoying, love-struck Genki Girl daughter of another martial arts family, seeks out Koshi to sire a child capable of mastering her family's most powerful techniques. Naturally, this not-so-subtle strongarming into Arranged Marriage (of course supported by the fathers of both youngsters) and newfound accompaniment of a pink-haired, Kamen Rider henshin pose-copying, totally enamoured imbecile is not to the taste of violence-phobic and martial arts-hating Koshi.