A man is confused about his ex-girlfriend, who texts him after two years. However, he already has a woman he is interested in but has not revealed his feelings to her. Therefore, he visits the MODU bar for solutions.

Yoo-na has a man that she likes, but his ex-girlfriend appears in front of him, taking him away from her. Therefore, Yoo-na goes to MODU bar, to ask for advice.

Woo-seok's ex-girlfriend appears in front of him but he is hesitant; college student Wonmyeong dates a perfect girl Min-ah for 500 days, but recently he has become interested in another girl; the MODU bar hosts offer solutions.

Min-ah and Wonmyeong date for almost 500 days, but they face difficulties when Wonmyeong's first love appears in front of him. Therefore, Min-ah goes to the MODU bar for realistic advice.

Si-a is invited to a colleague's wedding, but her ex-boyfriend might come, along with his new girlfriend. Conflicted, she visits the MODU bar for realistic advice.

Seunghwan obsesses over his girlfriend's past and constantly suspects her. Eventually, they end up fighting and Seunghwan goes to the MODU bar to ask for help.