Shounen ga Otona ni Natta Natsu
Ryuki and Kiriru, after their previous sexual encounter, find themselves in a compromising situation during a soccer match. Following Ryuki’s good performance, Kiriru rewards him in the backyard garden, where they nearly get caught. There, Chiaki, a childhood friend, discovers them and, driven by jealousy, challenges them to a sexual competition at school, where all three will be naked and try to sexually satisfy Ryuki.
