Xia Wan transmigrated into an old-school Mary Sue campus novel, becoming the cannon-fodder female side character engaged to the male lead, F1.
F1 found her a nuisance because he was in love with the female lead.
F2 saw her as unnecessary because he secretly adored the female lead.
F3 considered her troublesome because he needed the female lead.
As for F4… he was still abroad as an exchange student and wouldn’t make an appearance anytime soon.