Himeko saves a first-year student, Jin, from some punks, and he falls head over heels for her. In order to get him to stop hounding her, Himeko tells Jin that she's already got a boyfriend... Bossun! Now all she has to do is prove it to him...
And then practice some sport or whatever!
Practica kendo o algo.
¡Y después de eso practica algún 
deporte o algo por el estilo!
E pratique um esporte
 ou coisa do tipo!