Three sexually active roommates launch a hilarious competition to help a naive newcomer lose his virginity in exchange for free housing.
Four boys move into a sharehouse and get closer after getting drinks.
Peak, Thanwa and Latte each meet someone that Almond might like, so they decide to make their move.
Latte brings Almond to a sauna for a chance to bump into Jumper, and Peak and Thanwa unexpectedly show up as well.
Everyone attempts to bring Almond and Jumper closer together at a party, but it unexpectedly turns out to be a mistake.
Peak's fiance Jane suddenly arrives, while Almond sees something while working out that leaves him deeply unhappy.
Jane tries her hardest to have Peak and Thanwa get together, but Thanwa's ex Max shows up and tries his best to stir up old feelings.
Latte and Almond go to the beach for some R&R; Peak feels regret after facing the fact that Thanwa may leave.
Peak and Thanwa run into each other in a familiar place; the person behind the secret filming scandal is finally revealed.
Something Almond said breaks Latte's heart; Peak tries his best to figure out a way to get Thanwa to forgive him.
The Knock Knock house gets even more crowded when Almond's mother and Peak's father come stay at the house
Thanwa, Latte and Almond set off to find Peak, with Jane helping out.
As two couples make amends, a wedding takes place.
