The three childhood friends have been together since they were born, living next door to each other in a house next to each other. Akane and Kamejiro were always told by those around them that they were a perfect couple, so it was only natural that they started dating. The carefree and laid-back Riku also liked Akane, but perhaps out of consideration for Kamejiro, he never revealed his feelings to her and grew up without doing so. After missing the last train at a drinking party for the first time in a while, the two were unable to contain their feelings and so a relationship began. An emotional and erotic love triangle...