Hmm i think 1st ml and his ex girlfriend is not really in a relationship, i think 1st ml helping this girl and this girl friend to hide their relationship i mean they might be in a relationship (a Lesbian) and ml taking all the blame for them and that's why the trio are arguing because the girls doesn't want that and ohh the 2nd ml, i don't like him at all he is good looking and well build but not a relationship type of guy, for me he is just fuck buddy, a toy to play and ride on but not to be a lover. Period!
Ps: sorry for my bad language