When I went to university, I was invited by a senior to join the basketball club to make up the numbers. There I met Ria, who was one of the most popular and cute girls at university, and by some mistake I was able to start dating her. One day during practice I got injured and was unable to participate in the club's annual summer training camp. Later, I forgot about the camp and was practicing when I discovered a video recording of the camp, which showed the whole story of boys and girls having sex instead of practicing.