Death Match!

I'm Chang-Ju Lee, 26 years old, on the verge of graduating from college, and about to be crushed to death when a building collapses. It's all because a junior I met in my liberal arts class asked me to go to an exhibition in this building. All my friends told me to avoid him because he's a murderer, but I didn't believe them. From an objective point of view, X is handsome and has a cute personality, so how could he be a murderer? But... Should I have believed them...? (Source: BOMTOON, translated)