Akaneiro ni Somaru Saka OVA

During the course of the main series, Junichi Nagase and several others are invited to a "normal" vacation...on a privately owned luxury island. Everything is fine for Geno Killer and the group until a mysterious sunblock is introduced to most of the girls, resulting in...unique...reactions. Special episode of "Akane-Iro ni Somaru Saka" anime series. (Source: ANN)