Tsukiatte yo! Satsuki-chan

A childhood promise between Satsuki and her friend Tetsu binds them: if he becomes strong enough to protect her after a decade in China, she will date him. Ten years later, Satsuki has grown into a powerful karate practitioner, and Tetsu returns, also strong though he initially conceals it. Now, Satsuki must contend with other girls who have developed feelings for Tetsu, raising questions about whether she can maintain her place in his life.