Recently, Teruo has been suffering from nightmares of his wife, Yuka, being held by another man. These dreams deeply disturbed his mind. One night, Shogo, a close friend from their hometown whom Teruo treated like a younger brother, suddenly showed up. Both Yuka and Teruo happily welcomed him, delighted by the reunion. However, that night while Teruo was asleep, Shogo secretly met with Yuka. Teruo noticed the change in her behavior and was crushed by the harsh reality. Yet, at the same time, he began to feel a new pleasure and excitement from secretly watching her betrayal. Each step deeper into this situation gradually transformed his heart.