I know that the library girl is a yandere but she is the only girl who deserves the MC as she loved him always. Also, the US girl(looks like the best option). As all other women have been bitches or ingnorant. Cat is also a good candidate but she is interested because she is projecting the old...
I think, I understand their game now. They are looking to groom a guy, who could be the daughter's father as well as daddy(if you know what I mean) and if the person refuses to be the daddy then they screw him over and dump him to move onto a new father/daddy candidate.