If the killer isn't trying to show off, then what's the point of killing? The king of the underground world returned to the city because of a promise and became the personal expert of the school belle. He originally wanted to be a low-key pretty student, but he was constantly harassed by all kinds of beauties, including the school belle, lolita, royal sister, neighbor, and urban white-collar workers...
School belle: "Brother, I'm afraid of the dark. Come to my room at night."
Loli: "Uncle, you are so wretched."
Sister Yu: "I won't close the door tonight..."
Neighbor: "Don't peek at me taking a shower, pervert."
Protagonist: "... Wait a minute, let's sleep together..."
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.