Three men dreaming of making a film run a guesthouse called Waikiki to gather funds. While their venture fails, everything changes when a single mother and her baby arrive at their door.
The baby's single mother, Han Yoon Ah, tries to find a way to stay back. Joon Ki is stuck in the terrifying costume and makeup when the filming of his new movie gets delayed.
Joon Ki gets a new opportunity when an embarrassing video of him goes viral. Back at the guesthouse, Yoon Ah teaches Dong Gu how to deal with kids. Meanwhile, Seo Jin interviews for a job.
Doo Sik gets into trouble with his crush because of a text mishap. On the other hand, Dong Gu and Yoon Ah get quarantined after they are diagnosed with the flu.
Dong Gu is suspicious of one of Yoon Ah's classmates at the cooking class. Meanwhile, Joon Ki lies to avoid paying rent but soon gets into bigger trouble.
Dong Gu's ex Soo Ah reaches out to him at a time of need. Doo Sik runs into his first love. On the other hand, Joon Ki takes a desperate step to mislead the landlady.
After failing to make it big in the films, Joon Ki decides to take a less-than-traditional method to earn cash. Dong Gu and Doo Sik take different approaches while dealing with their crushes.
Dong Gu tries to impress Yoon Ah by taking care of Baby Sol, but ends up making a mistake. Meanwhile, Joon Ki attempts to make things right for Seo Jin after he messes up her job interview.