
If they just befriend the sis later (at least not right away) I'll drop it she's so annoying

They most likely will since that’s his actual sister and she’s clearly just assuming things about the MC based on her past own experience with someone who hunted hidden dungeons for fame and glory. She probably also assumed he killed everyone for fame and glory and it might have been a case similar to the MC’s instead

For those defending him, I understand, His feelings or lack of it is fine, I just hate the entitlement of "repaying" her with it. It's a very Arrogant thing and self centered, as he never told her for 6 years they were together. Which is honestly disgusting, he saw her feelings for him as he could trade it, he paid back her sincerity with faked feelings.
He could've told her he had no feelings for her yet and he feels indebted to her and they should start dating to "harness" it, this gives Yoo-min a choice to go through with his "lack of fluttering" and be aware that he is dating but doesn't love her, and she wouldn't feel betrayed
There is a 100 Rems across the dimensions that killed Enric crying their eyes out.