Rub-a-dub-dub -- a merman in a tub! Wakasa the handsome merman is being happily spoiled by Tatsumi, an ordinary high school student, when Echizen the super-sadistic crab pops up to take Wakasa back. Old rivalries flare when Echizen meets up with Takasu... Wait, those two were rivals? Also in this chapter, meet Makara, a clownfish with a sexy surprise! This comedy serves up laughter and heart as warm as bathwater!