This video captures intimate moments between a young college student named Mari and her neighbor, a university boy who harbored feelings for each other but never confessed. One day, Mari's cousin visits from Tokyo, causing tension in their relationship. As the story unfolds, we see Mari becoming increasingly distant and secretive. When the boy tries to confront her about any changes, she dismisses his concerns. Later on, he goes to return some borrowed items when he overhears strange sounds coming from Mari's room and sees her acting flirtatiously close to her cousin. Despite her denials, he can't shake off the feeling that something is amiss. Intrigued by these developments, he decides to spy on them using a selfie stick, only to discover they are engaged in sexual activities. Shocked by this revelation, he watches as Mari is passionately taken advantage of by her cousin. Unable to accept what he's seeing, he hesitantly approaches their doorstep, only to find it open. He steps inside, unsure of what to expect next.