Seitokai ni mo Ana wa Aru! – Episode 3 (EN): Puuru Souji de Mizugi Kai / Yokatta na

When Ume returns home, he spots a suspicious figure inside the house. The unexpected visitor turns out to be none other than his older sister, Matsu Mizunoe! What follows is an intense “Ume knowledge” battle between Matsu, Arisu Terui, and Komaro Michinoku as they compete over who knows the most about Ume. The clash quickly spirals into pure chaos, leaving everyone (especially Ume) completely bewildered. The episode also delivers the long-awaited swimsuit-filled pool cleaning segment, where the student council members are roped into helping the swimming club. Water fights, slips, and nonstop slapstick ensue as the mismatched group somehow turns a simple chore into another heartfelt yet wildly absurd day. Through all the eccentric antics and sudden family invasion, the student council’s everyday mayhem continues at full force. Directed by Naoyuki Tatsuwa with storyboard by Takeo Takahashi, this episode mixes fanservice, sibling dynamics, and the series’ signature chaotic charm into one unforgettable package.