Overflow(2020)

Overflow is an anime series following Kazushi Sudou, a university student whose quiet life is disrupted when his childhood friends—sisters Ayane and Kotone Shirakawa—unexpectedly visit. When Ayane discovers Kazushi has forgotten to buy her pudding and borrowed her special lotion, she plots revenge by joining him in the bath, with Kotone in tow. The series plays out as a comedic exploration of awkward situations and romantic tension as Kazushi navigates the chaos of having both sisters around. What begins as a prank escalates into something far more complicated, blending humor with the everyday complications of reconnecting with people from your past.