Idols who failed to impress the audience after their debut are given another chance to be back on stage in The Unit. Korean top producers will give them a chance to shine in a brand new unit with new members, concepts and content. (Contestants credited here are sorted by final rankings.)

University student Hae-rin finds herself torn between two men: Woo-jin, a junior she’s developed feelings for, and Eun-hwan, a former crush who returns with memory loss, eager to restart their past relationship. Caught between the past and present, Hae-rin must navigate this complicated love triangle.

Five girlfriends who want to show off their boyfriend's singing skills play a bet to see who's the best singer. All couples are given game money to bet on the vocal stages each boyfriend performs. At each stage, judges vote on a dropout, and girlfriends have to bet on her own boyfriend or another's boyfriend to keep the money and win the prize.