Tsukasa, Tajima, Katsu, and the newest member, Sae, formed the Hentai ShonenDai club when they were just 11 years old. They were all focused on perverted activities. As they grow up, will they leave their lewd interests behind or cling to them? In D-ASH, the boys' many adventures are chronicled as they try to mature as fast as possible while still being mischievous.