Aster tells the story of four young men, whose lives are connected by one incident. It all begins with Hiro Sakaki. He is a high school student, and enjoys his life with his old friends, Saki and Saya, twin sisters. Under the summer sun, their relationships change little by little... "No miracles will occur there—— But even so, hope remains" [Slightly edited from ErogeShop]

- "Cosplay Ecchi": Sex scenes with six heroines featuring erotic dress-up. - "Narumi! Fly High": Blow away Narumi in this one-button-click game. - Wallpaper and "system voice" files - "Cangnan Narumi Finding Legend": Narumi's body is in pieces and you have to collect them in this board game.