With Yuki’s Grandma still in the hospital, the boy’s everyday life is quite hectic. But by fishing every day, Haru, Yuki, and Natsuki are becoming more at ease with each other. Everything seems to be going well until Yuki uses his water gun after he promised not to.

Keito is coming home from the hospital and Yuki wants to get her a gift. He takes on the challenge to catching a tuna, her favorite fish. This will lead the boys to an area of water off limits and closer to Haru’s goal.

Duck, has declared martial law on Enoshima and are hunting for Haru and JFX. After a fail attempt by Koko and Haru to stop JFX, Haru becomes the alien villain to save his friends.