Psychopath You Are - Kihyun ✔

Who is he? Is he the real Kihyun? Why his personality changed? Why? Jihyan is a girl who to be loved by Kihyun. Yeah Kihyun love her so much. But one day something bad happend and Kihyun was changed. He's become a psychopath, cool and more scary. What happend to Jihyan after that?