The first episode of the anime Overflow , titled "Soft Sisters and Bathing," sets the stage for a short-form, intimate romantic drama. It features college student Kazushi Sudou whose life is interrupted when his childhood friends, the Shirakawa sisters, force their way into his bathroom for a "revenge" bath. The situation quickly escalates beyond a friendly visit in the small space. You can watch the series on Moviefone or JustWatch . A Comprehensive Review of Overflow - Yonathan and Friends