This whole story doesn't make any sense.
1- you don't like your bf anymore? Just break up
2- It's your BEST FRIEND, how tf can you betray his trust like this?
3- Now this new girl using MC to make his ex jealous? Trash
1-Females are different from males. We would break up with our gf if we rlly don't want anything to do with her but it's different for women tho.
She is friends with both guys so breaking up with her bf to go out with her bf's bestfriend would
1: make her look like a h03 (not only to the eyes of both guys involved but also to the public eye).
2: it would create some type of confrontation between her and Takt, who clearly cares about her, and between Takt and the MC and women in general try to avoid confrontation.
3: She senses some interest from the MC but the MC won't give her enough peace of mind/courage/security that he will go out with her and that if a problem where to happen they would still get involves with each other.
So instead of just breaking up (as you say) which she can't just do, she is prob waiting for some type of initiative coming from the MC, some type of confirmation that will give her enough security to make that decision. Hope this made sense to you.
2-I agree. It's either the girl or your bro. Personally I don't like Takt one bit (weird vibes) so I would just take his girl (fck him lol) but the MC seems like he cares for his friendship with him so he should establish a clear boundary between him and his friend's gf
3-I agree yet again. I don't like the kouhai. She just came in and has 304 written all over her face. The way she acts is just not it. She might be cute but her behaviour is repulsive. Not wifey.