Quick answer — Koin worked on BOFURI: I Don't Want to Get Hurt, so I'll Max Out My Defense. (Original Character Design), Nyaruko-san: Another Crawling Chaos F (Original Character Design), BOFURI: I Don't Want to Get Hurt, so I'll Max Out My Defense. Season 2 (Original Character Design) and 8 more anime.
Koin worked on BOFURI: I Don't Want to Get Hurt, so I'll Max Out My Defense. (Original Character Design), Nyaruko-san: Another Crawling Chaos F (Original Character Design), BOFURI: I Don't Want to Get Hurt, so I'll Max Out My Defense. Season 2 (Original Character Design), Nyaruko-san: Another Crawling Chaos W (Original Character Design), Haiyore! Nyaruko-san: Yasashii Teki no Shitome-kata (Original Character Design), Nyaruko: Crawling with Love! (Original Character Design), Kanokon: Manatsu no Dai Shanikusai (Original Character Design), Haiyoru! Nyaruani (Original Character Design) and 3 more.