"Overflow" is an adult-oriented anime series that premiered on January 6, 2020. In Episode 1, viewers are introduced to Kazushi Sudou, a college student who finds himself in an unexpected situation with his childhood friends, the Shirakawa sisters, Ayane and Kotone. The episode begins with Kazushi accidentally walking in on the sisters bathing, leading to a series of intimate and provocative encounters. As the narrative unfolds, the complex dynamics between the characters are explored, highlighting themes of forbidden desire and the blurred lines between friendship and romance. The animation is notable for its detailed character designs and explicit scenes, catering to mature audiences. "Overflow" Episode 1 sets the stage for a series that delves into the complexities of human relationships, combining elements of drama and erotica to create a provocative viewing experience.