ないしょのカウント5

紹介(英語)

Ayaka and Issei accidentally took the pill that can turn themselves 5 years old younger whenever they panic. Issei's dad tried to find the antidote but the result change nothing aside from that they will get 5 years older when they get angry.

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単行本(3冊)

• ないしょのカウント5 1(1991)ISBN 9784061763319
• ないしょのカウント5 3(1992)ISBN 9784061763333
• ないしょのカウント5 2(1992)ISBN 9784061763326