Boy loves girl, who loves boy, and boyfriend.
More specifically, girl loves boy (who loves girl), but is co-dependant on boyfriend, who is co-dependant on her.
Girl enjoys seeing boy from time to time, and enjoys his affection, attention and the sex (she aint getting any from the boyf, he works too much).
Boy would love to win her over, but has realized the truth - she aint leaving boyf. Boy is leaving Taiwan in six months or so, and kinda realizes that she will have the boyf as a ‘cushion’ when he hits the highway.
Who wins and who loses here? All three? Seems like heartache for the three of them, at some stage or another…