Tsugumi came to stay at her lover's house for the first time. My heart throbs at the first sex with him, which was my long-cherished desire! Slowly pushed down on her bed, at that moment when I thought it was finally... a mysterious handsome boy appeared in front of her. Is this a surprise, or is it a famous human observation variety? While thinking about such things, Tsugumi searches for her lover who suddenly disappeared. But she was nowhere to be found even after searching the room. Meanwhile, when I called his name, the boy answered for some reason...! ?