The catch? It’s a "game."
This episode successfully juggles three tones: It sets up the rules of the world, gives the villain a terrifying presence, and most importantly, locks in the chemistry between Park Bo-young and Park Hyung-sik. Strong Woman Do Bong Soon - Season 1- Episode 2
He gives her a ridiculously expensive限量版 (limited edition) game console and tells her the rules: protect him from an unknown threat, and she keeps the console. Fail, and she pays him back. The catch