Maou no Ore ga Dorei Elf wo Yome ni Shitanda ga, Dou Medereba Ii? EP4 - When an Archdemon Offers You Anything, You're Better Off Saying No

In an effort to give Nephy power she has some control over, Zagan takes her on as an apprentice. However, after a meeting with the 12 remaining Archdemons, he begins to doubt whether he can give her a normal life.