From xiaojiangworld:
With a weak personality, Yuzuru is always by himself and treated as a ghost. He quietly goes through life until one day, hea??s caught by his kouhai, Kyoya Tachibana. Kyoya, who belongs to the a??winnersa?? asks, a??Want to be my sex-friend?a?? Though Yuzuru is initially against the idea, he is intrigued by the occasional glimpses of Kyoyaa??s sad facial expressions. A love story between a twisted selfish boy and an insecure hidden beauty!