Responses

I think it's to show his entitlement to the situation. He can only think of the good days they had when they were together not the shitty shit he is currently doing. Peak narcissistism: "Look what I did for you. You only got to this point because of me."
Unfortunately for him her guts are being rearranged so she got no time to think.
i dont really get what they're trying to imply by showing how mincheol was when they were teens. that even tho he was good to her then, she doesn't need to stick to him now that he's toxic? or that even the shittiest person has a good side/past? i dont get it.