I just watched Ep 8...Here my thoughts:
I feel so bad for Su Min. She really thought Choi Si Hun would choose her but then he went straight to Ji-a
IMO So-Yeon, Yea-Won and Su-Min were the most genuine girls on the show. Ji-a seemed shady to me. She clearly made the new guy believe she was interested in him till the very end. Anyway, I feel she is not searching for love but rather promoting her image