My girlfriend's twin sister seduces me with her overly carnivorous approach Hikari Takifuyu - Mayu Suzune

The movie revolves around the complex relationships between the main characters, particularly the dynamic between Hikari, Mayu, and Yuzuru-kun. Hikari, being the twin sister, seems to have a close bond with Mayu, but also develops an interest in Yuzuru-kun. As the story progresses, it becomes clear that Hikari's intentions are not entirely pure, leading to a dramatic tension in the relationships between the characters. The title suggests a seductive and potentially manipulative approach by Hikari towards Yuzuru-kun.