Bouai Friendship

From xiaojiangworld:

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