Okkk

Here's my theory. I think the huimin in real world is just huimin's imagination. Like a coping mechanism for him not to spiral and completely lose his mind. With that one pannel where he said "I think we would be more happier if we just stayed as friends". Hinting he don't want to relive the past and be hurting himself and iheon over and over again. That bear sketch just tells us that huimin indeed remember his past but develop this "real world" huimin as his another personality to cope up. He really do have split personality disorder i guess.