Urusei Yatsura Vol. 12 (manga)

Lum tries to encourage a Tomobiki High student to stand up for herself against some bullies and ends up facing off in the ring against the head of the Butsumetsu High delinquents. Good thing Lum has hidden strength to draw upon! Later, Mendo is called upon to save a fair maiden—by going on a date with her! But the peril Asuka faces is her own boy-phobia, so Mendo just keeps making things worse!