"Overflow" is an adult-oriented anime series that delves into complex relationships and intimate encounters. In Episode 1, we 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 while they are bathing, leading to a series of provocative and intimate moments that set the tone for the series. As the episode progresses, the dynamics between the characters become increasingly intricate, exploring themes of forbidden desire and the complexities of human relationships. The animation in "Overflow" is notable for its detailed character designs and expressive scenes that enhance the sensual atmosphere of the narrative. The first episode effectively combines eroticism with a storyline that hints at deeper emotional connections, making it a compelling watch for fans of the genre.