Isn't the guy the one who is having it worst here? 3 people who couldn't be honest, but the guy, who tried to move on, ended up being dragged along by the twin's endeavors.
Okay at least now he got the girl he liked at first, but at this point he had already once cast that love aside and developed feelings in a happy relationship, only to be ended abruptly to be told to go after his first love that he moved on from. He gets together with that girl but now his love for her has already been affected and the seeds of love from the previous relationship had been planted. To make it worse, the first love rejects the guy after dating him which is kind of contradicting because it wasn't like her answer was left ambiguous and they were even being intimate. The first love sounds like a schemer and it's what caused her to lose in the first place, yet it's like she's trying something now. This part is for real for the sake of drama or plot. Can't complain cause if that's the aim then it's what it's.
So what is this? 2 girls planting the seeds of love into a guy by going as far as to dating him, then dumping him so you can, "reset," the relationship after making him love you? Sounds like courting someone but with extra steps. "I want my crush to like me, so I'll date him then break up with him"
Usually, more than 1 girl liking a guy in a non-fantasy manga would of course leave some unsatisfied because the girl they were rooting for, may lose. I'd usually avoid but I accidentally read this and now I have to know how the fuck it'll end.