Karina and Seojin are two idols from different groups. Karina is from Aespa and Seojin is from Siren. However, a variety show creates a strange bond between them.

Brust Seojin spat out his coffee when he received a contract to appear on a variety show as Karina's son. The cast and role were chosen randomly, and he had no choice but to do it.

On their first day together, Karina arrived first at the apartment where they'd been living for a month to bond. She was awkward because she wasn't ready to play the role of mother to her junior. "Huftt, what should I do? What should I say to her?"