Yami To Boushi To Hon No Tabibito s01e04
Titre original : Mariel
Ritsuko is serving the princess Mariel. Mariel falls for the charms of Gargantua, now an alchemist. His attempt to sacrifice her is foiled by Ritsuko, but the princess is rendered half-demon and takes her own life. Lilith appears before Gargantua and accepts Mariel’s soul as payment.