Dark Wizard of Hyeongwang Villa

About

Dai, a middle school student, wants to curse the person responsible for killing Norangi, a stray cat he dearly loved. With the help of Belzerok, a conversational AI, he attempts to summon Nekphoros, the legendary great demon of cats. However, his devout Catholic grandmother, Gyeongja, who lives with him, keeps interfering with the summoning ritual.