Honestly, I think it's just how cold the girl is being to her brother-like friend but honestly, her behaviour isn't that bad, she's just getting swept up by her boyfriend which is common her age lol.
I dont really see how cold the girl is... But as you said, crushes are pretty normal. Its not like brothers-sisters should drown their siblings with mushy stuff all the time. Its like so normal. Most of them even fight with each other but still cool at the times needed.
I find it lack of affection from MC for it to be NTR or 'I Like Her first' scenario. NTR work only for Husband/Boyfriend/Lover. Her only value for MC is a friend and temporal emotion support after his parents died, which seems that no longer necessary.
I find it lack of affection from MC for it to be NTR or 'I Like Her first' scenario. NTR work only for Husband/Boyfriend/Lover. Her only value for MC is a friend and temporal emotion support after his parents died, which seems that no longer necessary.
Idk man opposite sex childhood friends like this are usually on track to become partners down the line
The whole dungeon thing and MC being quite a few years older mentally threw a wrench in it but all the flags remain raised
At this point he has better chances scoring with his accountant though lol