Golden Time (2013)

It's a perfect day to go to the beach. 2D-kun heads to pick up everyone in the car, but Banri, Koko, and Chinami are late. They finally manage to pick up Yanagisawa, but they fall later and later behind schedule due to traffic, and everyone is extremely annoyed and exhausted by the time they arrive. What does Banri do in order to lighten the mood?!