"Then a camp! Let's have a training camp in the summer, instead of a reward!" The final exam is over and the summer vacation is about to begin. The club is on the verge of disbanding, but a new member and kouhai, Serizawa Chisa, requested me to hold a training camp at the sea. With the club's small budget, we managed to plan a one-day camp in the club room and at the sea. However, there is no way that a camp with a self-indulgent and mischievous​ girl like her is going to end without a hitch...... The sea, swimsuit, battles!? In the end, what is my relationship with this girl next to me!? A different summer from "that time" (if) is coming! [Translated and edited from the Official website]