 
																				
                                                Lol yes they're not acquainted but they are in the SAME CLASS. Classmates get it? It's not as if that Justin guy is some rando he met online or elsewhere. y'all weird. I has classmates who I never talked to before and was invited to their house to do projects. Theyre more convenient coz you can eat while studying and you wont need to bother with being noisy, staying late or spending a lot. 
Also Seowon seems to be a sociable person trapped in a sick body. It's kinda understandable why he wants to push himself to the limits and do things he never done before. Unlike before he can't refute coz he has to follow his dad, now he's more complacent coz Aiden is more understanding and he's confident that he will take care of him.                                            
 
																				Girl they’re classmates and are studying. They most def met in class and made these plans. That’s usually how people do home visits. The MC is also a man. The MC is chronically ill. These little things are most likely everyday occurrences that feel minor to him so he is being sensible about them and is still moving his life forward.

 
		
Seowon's character is becoming annoying asf. The earlier he accepts that he is is sick, the better. He puts himself in unnecessarily uncompromising situations. I just know going to that Justin's house for studies won't end well. They could literally study anywhere, yet he choses to go to a stranger's house.