Fantasy: I Study During the Day, and I Am King at Night

Other monsters: This b is still studying, which makes us afraid to go to school to make trouble for fear of disturbing the adult. Lucifer: I'm starving to death. Those little brats are so arrogant during the day, but all of them lose their temper at night. Moreover, the person I'm possessing has such bad taste that it's really troublesome for me to have to change my clothes every night. Me: Why do I change my clothes every day after going to bed? Is it because of male ketone? This is a story about a school student who is possessed by the demon lord Lucifer, but cannot assimilate and can only coexist, and then slowly becomes a new demon lord and seeks revenge from heaven. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.