Ranma ½ (1989)

S1E44 Rub-A-Dub-Dub! There's a Pervert in the Tub

Upset about being barred from joining Akane at the hot springs, Happosai plots to reclaim the scroll holding his powerful technique, The Happofire Burst, to exact revenge. Meanwhile, Ranma is equally determined to secure the scroll before him, leading to a clever showdown as they both attempt to sneak into the scroll's hiding spot—an all-girls hot spring. The two engage in a hilarious battle of cunning as they navigate the challenges of their respective missions.