Sanshiro, a teenage martial artist, trains in the Kurenai School of Jiujitsu and searches for his father's killer. Accompanying Sanshiro is an orphaned boy named Kenbo and his pet dog Boke. Sanshiro's only clue to his father's murderer is a glass eye left on the scene of the crime, suggesting that his father's murderer was one-eyed.

Неунывающая школьница и дзюдоистка Мити Сонода объявляет своей подруге Санаэ Такигаве, что оставит спорт после победы на грядущем школьном турнире, поскольку хочет, чтобы молодость у неё ассоциировалась с романтикой и парнями, а не с потными татами. Для Санаэ такие новости как снег на голову, ведь именно Мити привела её в секцию дзюдо. Однако план Мити терпит крах, поскольку на турнире она с позором проигрывает Тове Хиуре, которая, как выясняется позже, перевелась в ту же школу, где учатся Мити и Санаэ.

A Judo student and a dashing young man who plays piano are both of interest to young Nonoka Aida. Then her childhood friend shows up from abroad to keep his promise that he would marry her as declared by her deceased father on his deathbed. This newcomer is determined that Nonoka is destined to become his bride but he will need to stand up to her amazing Judo skills and the affection she shows for her two classmates.

A story about a student who starts a judo club for the wrong reasons and has to keep it going when it blows up.