第 8 集: Jin 協助白鯨女孩克服發聲挑戰，成功加入偶像團體。

Jin's class is sent on a trip to Seton's Sea Academy. Shiraumi Kana, a Beluga whale-girl, fails to put on an impressive welcome show and flees. Ranka and Mei Mei learn Kana wants to join the schools' idols, a pod of dolphin-girls. Bando Ruka, the dolphin's leader, denied Kana entry to the swimming club as Belugas are slower than dolphins. Jin tells Kana to form a singing show, as Belugas are excellent vocalists. Unfortunately, Kana is a terrible singer. Jin is approached by Ruka who, due to the dolphin's unusual sleep patterns, alternately begs tearfully then forcefully demands Jin convince Kana to quit as a mixed species show is impossible. Jin is scared by a giraffe-boy who is romantically interested in him. Like Ruka, Kana is worried separate species can't swim together, but Ranka is confident Jin's singing idea will work since he got the cooking club girls to work together. Feeling guilty, Jin points out Kana has been trying to sing with her mouth, but Belugas actually sing using a special nasal cavity on top of their heads. Kana and the cooking club put on a show and Kana manages to sing a beautiful song that resonates with the nasal cavity in Ruka's head, causing her to realize the emotional side of her brain wants to help Kana even more. She and the other dolphins join the show with Kana leading them. The show is a success and Kana is invited to join the swimming club. Later, Jin almost has a chance to confess to Hitomi but is interrupted by the giraffe-boy. (Source: Wikipedia)

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