Robuta

https://mangahentai.me/manga-hentai/c93-muchakai-mucha-chizuru-chan-kaihatsu-nikki-5-chizuru-chan-development-diary-5/

https://onlydoujin.com/muchakai-mucha-chizuru-chan-kaihatsu-nikki-zenpen-kataomoichuu-no-sensei-no-tame-chuunen-kyoushi-ni/