Saeko needs to just fucking admit shes somewhat jealous nd stop dicking around, i get it shes always just been in relationships for fun and it seems someone really made her feel like shit being jealous and very distrustful of her and she doesn't want to do that to Miwa but she really needs to talk about this with her and just accept she wants to monopolize Miwa, theres nothing wrong with that as long as its not some obsessive shit.
Im real worried about this actually, ive seen weird shit like a girl cheating on a guy cuz he didn't get jealous enough about her and she felt she wasnt loved, most girls ive met like that kinda moderate possessiveness and care when theyre in a relationship, i think Miwa's "sure do whatever i believe in you 100% i dont mind at all who youre with" is a bad course to go on.
Miwa also really needs to fucking man up already, i hate people that pussyfoot around everything and are easily led on lol, im real worried for her as well.