Nita, a dog that lives in Sunshine Academy's student dormitory, brings home with him a puppy that suspiciously looks like him—this sends everyone into an uproar as it is eventually concluded that Nita likely had a puppy with somebody else. Elle, Shunsuke, and the others collaborate with one another to take care of it, but a delinquent biker boy named Takizawa uses this opportunity to trick Elle into joining him on his yacht for nefarious purposes. Shunsuke & the others, having realized this, rush in to save Elle from Takizawa before it's too late.
| Actor | Role |
|---|---|
 Keiko YokozawaNatsumi Asaoka (voice) | Natsumi Asaoka (voice) |
 Toshio FurukawaShunsuke Aoba (voice) | Shunsuke Aoba (voice) |
 Eiko MasuyamaKomachi (voice) | Komachi (voice) |
 Eiko YamadaKozue (voice) | Kozue (voice) |
 Hiroshi OtakeMonta Akai (voice) | Monta Akai (voice) |
 Kaneto ShiozawaTakizawa (voice) | Takizawa (voice) |
 Masaharu SatoKinta Kameyama (voice) | Kinta Kameyama (voice) |
| SSanji HaseKazuo Tsurui (voice) | Kazuo Tsurui (voice) |
 Tomiko SuzukiMadoka (voice) | Madoka (voice) |
 Banjo GingaTetsuo Kanekoji (voice) | Tetsuo Kanekoji (voice) |
 Hiromi TsuruSumika Kanzaki (voice) | Sumika Kanzaki (voice) |
 Kiyonobu SuzukiKotaro Hayakawa (voice) | Kotaro Hayakawa (voice) |
 Kozo ShioyaMan (voice) | Man (voice) |
 Kyoko TonguMako (voice) | Mako (voice) |
 Seiko NakanoSeiko (voice) | Seiko (voice) |