Blondie definitely had feelings for the black haired guy and was feeling envious of the MC right? Saying he lied about having the same taste in men so he could maintain his relationship with the black haired guy, only being interested in the MC because he wanted to understand what the black haired guy saw in him because he never looked at him that way. Honestly didn't really feel like Blondie liked the MC, atleast not like the other guy did, but maybe I'm reading into it.
Ahhh is the suicide bomb in this chapter meant to foreshadow the bomb Taekjoo escapes with coming up, freaks the hell out of Zhenya cuz he'd rather let him go then have him die.