Quick answer — Mutsumi Sasaki worked on LAID-BACK CAMP SEASON2 (Character Design), Laid-Back Camp The Movie (Character Design), Laid-Back Camp (Character Design) and 14 more anime.
Mutsumi Sasaki worked on LAID-BACK CAMP SEASON2 (Character Design), Laid-Back Camp The Movie (Character Design), Laid-Back Camp (Character Design), Kokoro Connect (Prop Design), Phantom: Requiem for the Phantom (Character Design), ROOM CAMP: Saunas and Grub and Three-Wheeler Bikes (Character Design), Tari Tari (Animation Director), Yuru Camp△ OVA (Character Design) and 9 more.