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When a picture of his late grandfather falls into the ocean, Shima jumps in after it without thinking. Nearly drowning, he is saved by a very perfect stranger - the young merman Isaki. Shima and Isaki quickly bond in ways neither anticipated. After all, Shima and Isaki aren't just from opposite sides of the tracks but from entirely divergent species, which makes maintaining a long term relationship anything but easy sailing.
While tidying up the house, Keiichi discovers a notebook of his grandfather that contains a picture of a mysterious girl and a treasure map. Excited by the prospect of an adventure, Urd and Skuld are itching to go with Keiichi to find the loot, but tight funds mean the Auto Club's annual camping trip takes priority. What's more, the young maid hosting the group is convinced that a promise made with Keiichi ties the two together! To make matters worse, Peorth is determined to make Morisato confess his true feelings for Belldandy. Will Keiichi ever be able to say 'I love you', or is the pressure too much for him to handle?
Freed from his longtime prison, Belldandy's mentor Celestin is once again trying to overthrow the Goddess System, but he can't do it without her. To "help" her decide anew whether to join him, he blocks her memories of Keiichi. As Keiichi and company race to restore Belldandy's memory, Keiichi also has to deal with the mysterious Morgan, the one who released Celestin in the first place!
Class president Seung-taek is the only person who ignores the troublemaker Gyu-bin. They belong to whole different world and they seem like they can’t get along at all. However, once they enter Gyu-bin’s house after school, their relationship changes strangely…
The official music video for The Naked King ~Utsukushiki Waga Jinsei wo~ from the EP What a Beautiful Life, by BIGMAMA.