Hentai is based on the eponymous cgi novel from the private circle Zenoms. Adaptation in the form of animated comics was made by the Studio Survive in 2018. 

The protagonist tai Chi Hasegawa recently began Dating his childhood friend Ayano Ichinose. They spend a lot of time together and their relationship grows stronger. Since Ayano-Chan is a member of the tennis club, she is invited to senior students will go to a tennis camp, which is located high in the mountains. As always happens in hentai-the girl gets into bad company, then she is intoxicated with alcohol, unconscious girl serves a lot of guys and then blackmailed sex photos. Together with Ayano-Chan, other girls get into the sex camp...