Yuko and her husband were forced to suddenly move back into their family home to oversee maintenance work on their apartment, also taking care of her younger brother-in-law, Yoshiaki, who lived alone. Once a popular amateur band musician, Yoshiaki missed his chance at stardom and now isolates himself, claiming to write music. Yuko, a devoted fan, continues to passionately support him, hoping for his return to the spotlight. However, Yoshiaki has secretly been in love with Yuko for years, and taking advantage of her kindness, he forcefully overpowers her. Yuko tries to reason with him, but his intense advances overwhelm her, and her body gradually responds, growing wet despite her inner turmoil. Caught in the warmth of his touch, her resolve begins to waver.