Haruta and Rio are childhood friends, Haruta used to cling onto her so much. Because of that Rio only sees him as a clighy little brother. The only regret he had was not able to confess his true feeling to Rio. Haruto wants Rio to stop seeing him as little brother, he wants relationship closer than that, but the current Haruta had slim chance to win over Rio's heart. He decided to study hard to get a good grades then graduate and have a decent job to stands as the man who Rio loves someday. But unfortunately, he was already too late. The guy who used to be leader of neighborhood kids, Kaito, returned to their town. Kaito always had his eyes on Rio all the time, and so does Rio.