Responses
I see why he wouldnt ask Dojin for help though. He thinks Dojin's job is amazing and more important than him/his studies (he never complained when Dojin was too busy to come home), and Dojin is so busy already. He already knows he owes Dojin a lot, so I don't think he would dare to ask for help and Dojin has to be the one to offer to help (if his schedule allows him)
I used to be on the hating Hyesung team but after the side stories he has finally become a human who wants to have fun but wants to be responsible, seems like he's not that annoying selfish Hyesung anymore. So I find the complex feelings he's having right now quite pleasant to read, I'm looking forward how this will develop
But I think he should ask Dojin for help, I bet he wouldn't mind looking after Byul while Hyesung hangs out w/ his friends that way he can make friends, feel more comfortable and eventually come clean about his marriage