I'm a timid person, but I got my first girlfriend in college. Her name was "Umi-chan" and she was a super cute and serious girl. The other day, I was enjoying a healthy, lovey-dovey relationship with her in my room... Suddenly, the doorbell rang out loud and loud. When I rushed out to the front door, I saw "Takemaru-senpai," the most crazy delinquent in the prefecture, who hadn't been here in three months, come walking in with his shoes on as usual...!