Akuma Yashiki no Kyouikugakari

Reki Asubino has a cursed mark on his hand, causing others to avoid him. His parents have abandoned him, and he now lives alone in the Devil's Mansion. Despite having many non-human servants and numerous gifts, Reki longs for a human companion. One day, he receives something he desires in a box. However, the gift includes not just a human, but also a teacher and a friend—though the nature of this relationship remains uncertain.