This week's guests are Jang Hee Jin, Bona of WJSN, and Kim Jae Young. Amongst the members and the guests, one secret couple and one relationship virgin are hiding, and the relationship virgin exists to catch the secret couple. As they play games, some members start to act unusual and suspicious. Stay tuned to find out if the relationship virgin manages to catch the secret couple.

The members continue to try to find and eliminate the secret couple. The relationship virgin reveals themselves to the confirmed single members, and they start to narrow down the candidates for the secret couple through two trials. Will the single members and the relationship virgin be able to find the secret couple? After the secret couple is revealed, a special episode for So Min's birthday begins.