Yuri Hiroto has started having vivid, embarrassing dreams in which he is groped by sea creatures. To make matters worse, each dream features a silent observer: Ogasawara-kun, the marine biology enthusiast in his class. Ogasawara is openly passionate about undersea life to the point of being considered odd by others, but Yuri, who has been hiding his attraction to men behind a carefully maintained “normal” facade, finds himself drawn to Ogasawara’s unapologetic authenticity. The moment Yuri acknowledges his crush, his dreams become even more explicit. When the two visit an aquarium together, Yuri becomes aroused simply by watching the fish with Ogasawara. The story follows Yuri’s struggle to reconcile his closeted identity with his growing feelings, all while his subconscious turns every aquatic encounter into a source of both anxiety and desire. The narrative balances comedic awkwardness with genuine romantic development, set against a school and aquarium backdrop.