For Sunny & Joyce I was thinking of Flying Fox of the Snowy Mountain 1999 but Placebo Cure works as well...
Yeah, Frankie & Gigi were in the The Change of Time. She married Francis later on in the serie, Maggie Siu was also in there. I believed it's a TVB production (around 1991 or 1992, not sure about the year of release)
Marco and Esther were in an old, comedy modern serie
they hated each other at the beginning. hE liked her but she never likes him. yeah they weren't a couple. Sorry! thought this game was about [who hated who] only, I didn't know they have to be a couple, my mistake!