Kouta is the prize in a battlefield fought with food between Chizuru and Nozomu, but neither of them can cook well and Kouta is the one suffering as he is forced to eat terrible food experiments concocted by the two girls. Chizuru and Kouta also get attacked, but Kouta takes the hit for Chizuru and is knocked unconscious. Feeling guilty the attackers (which one of them is a frog spirit) tries to help Kouta by making toad oil (even though she is a frog spirit) and Chizuru cannot help but get more intimate with Kouta by rubbing the oil in with her body, but Nozomu joins in and Kouta panics again. Back at school, a fight breaks out between Chizuru and Nozomu that leaves Kouta shouting at Chizuru and then she cries and runs off. Kouta soon follows finding out that Chizuru was faking it and that she just wanted some alone time with Kouta in a very playful way.

Chizuru, Kouta, Tayura, Nozomu and their friends go to a beach that is only known to spirits. After some trouble changing (no changing rooms and Nozomu having a rather unusual swimsuit) and an attempt at sunbathing, they discover a beach house nearby which is run by none other than Chizuru's mother Tamamo, and Yukihana. Tamamo once again tries to win Kouta's affections, much to Chizuru's frustration. Back at the beach, the group enjoys themselves with a barbecue and fireworks, but Chizuru is bothered because she cannot be alone with Kouta. Akane gets into trouble when she drifts too far offshore and is rescued by Tayura, making her warm up a little to him. Chizuru asks Kouta to take a walk with her on the beach under the stars, and eventually asks him how he feels about her.

Chizuru wants Kouta to say he loves her, but he is very hesitant. Chizuru tries several methods to make him say it, but gets frustrated. Tayura asks Akane out on a date and she accepts, but says she wants to go to an art gallery instead of usual popular date spots like an amusement park. Kouta admits that he loves Chizuru in the end when he spots her crying in the rain on the bridge where they first met. Kouta and Chizuru become lovers, and Nozomu barges in saying that she accepts their relationship, and that she in turn will be Kouta's mistress, a thing which to Kouta's dismay Chizuru accepts.