On the day of the trip to the beach, the group encounters several mishaps on the journey. It starts off with Koko and Banri meeting Nijigen at the wrong place, and delays in picking up Chinami and Mitsuo. Heavy traffic slows their exit from the city. It rains despite contrary forecasts. The group arrives in the middle of a rainstorm. Needing to use the restroom, Koko gets out of the car in her swimsuit, and the rest of the group follows. The rain stops and the group enjoys their beach day. With Nijigen feeling exhausted, Koko instead drives the car back home...