The Big Shot Is Always Picking Fights with the Professor

What happens when her ex-boyfriend, who died years ago, suddenly reappears under another identity? What happens when she figures out who he is while he keeps flirting with her? What happens when her ex tells her he can see the future and has been serving his country all along? What happens when someone tells her that during all those years they were apart, her ex had been protecting her and her family...? What happens when her ex shows up holding a child and says it's hers...? Ye Ling: “???!!!”