Nightfall, Heartfall - Episode 5

After a quick hookup, two people trade talk: one mocks the other's seduction ("you'd get an F") and reminds them they owe money. One asks the other to seduce their brother and make him addicted. In return they'll clear the debt and help find the other's sister. They also criticize the earlier backroom performance with Pablo. Pressured by the payoff, the second person accepts the assignment. The episode ends with that agreement - now they must seduce the brother to earn debt relief and a lead on the missing sister.