The main Ojisan and Marshmallow manga inspired a television anime adaptation in January 2016.
The manga features Otoi himself interviewing Kashiwagi and Watanabe, and the idols talking about their plans to be idols even 10 years from now.
Otoi is the author of the Ojisan and Marshmallow manga.
This year’s 11th issue of Futabasha’s Manga Action magazine published a one-shot manga by Rekomaru Otoi on Tuesday featuring AKB48 idol group members Yuki Kashiwagi and Mayu Watanabe.