 Keitaro fell asleep during his Tokyo U exam. He was so embarrassed that he was going to fail a fourth time, that he runs away from home, visiting a far away island instead. Naru decides to go after him, and worried, their friends visit the island as well. When Naru gets there, she sees Keitaro, but he s running away with another girl. Naru has to figure out what s going on, and their friends have to try not to stay lost.