I have a weak personality and I have the first girlfriend in my life at university. Her name was "Umi-chan" and she was a super cute and serious girl. The other day, I was enjoying a healthy relationship with her in my room. Suddenly, when I jumped out to the front door in a hurry with a banging ping pong that echoed, it was a long time since I returned young, and the prefecture's most crazy specialty DQN "Takemaru Senpai", which appeared for the first time in three months, climbed up with a dignified foot as usual. It's done ...!