Spoilers
I think it's Smith too, especially since that person and YW spoke in English (the dialogue was italicized). So I think that eliminates TW or any of the Korean characters. Why must cliffhangers be a thing? And yes, I loved the bickering, and I hope it continues even after YW and TW get together.
They would be so cute as bickering friends/rivals! Yeah, he definitely needs more people he can actually talk to, like with Emma. And the fact that Alex doesn't worship TW (like some of his friends do) will probably help TW lower his guard, especially since he doesn't have any positive expectations from Alex to meet. I can't wait! I really hope and trust that the author will show the after part of when they get together.
raws aren’t in english lol they’re in korean. but here they are: https://chiupload.carrd.co/
*spoilers from the new raw chapter*
seeing taehwan and alex bickering with each other lol, idk why but i feel like they could be good friends. they may hate each other’s guts now but later on, best buds, maybe?
anywho, i’m sure the person who called out to yeonwu is either chris or some stalker we don’t know yet.