Natsu no yoru no yume

Summer vacation arrives, and Kyouko starts inviting people to a summer trip, even to Kou Sawanoi. It seems like everyone's invited except, Akira and Fumi. However, they are plenty busy with other plans for the summer holiday. However on Kyouko's camping trip during a "test of courage" activity, Kou debates whether or not to reveal a huge secret...