Chika, Nao, and Ryou are all friends...with extra, extra benefits. During a threesome, Nao, a loving and mischevious boyfriend with plenty of affection to go around, proposes Chika try out being a bottom. At first, Chika refuses, but after some convincing from Nao, he eventually gives his ass up to Ryou. Once Chika and Ryou start doing it, a whole new door opens to their relationship. (Source: Fantasista Inc.) <b>Included one-shot:</b> Volume 1: Ame no Hi Syndrome