A naughty summoner seems to have some pets they've acquired to train. Selkie clearly likes the idea, so she tries to show a reluctant Lethe how to play along :3

A piece commissioned for me by EUDETENIS! You can find more of their work here https://www.pixiv.net/en/users/2933491

EUDETENISから私に依頼された作品！あなたはここで彼らの仕事をもっと見つけることができます https://www.pixiv.net/en/users/2933491