Becoming a Demon: The Day I Turned into One, Hahahahaha

The beginning was actually pretty good, but the two characters who appeared later (the female lead's identity is unknown or uncertain) had some issues. First, how could someone seeking revenge not research their enemy's appearance? Second, their affection levels were inexplicably high (this is likely foreshadowing), and they even wanted to sleep together. Overall, it's alright so far.