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Soo-ji gets mad at Sang-goo for invading her privacy, and Sang-goo tries to understand her. The friends find out about how Won-seok broke up with Ho-rang. Meanwhile, Ji-ho gets a job offer from a production company.
Episodes
1Because This is My First Time Being Thirty 2Because This is My First Kiss 3Because This is My First Proposal 4Because This is My First Marriage 5Because This is My First Promise 6Because This is "Our" First Time 7Because This is My First YOLO 8Because This is My First Husband 9Because This is the First Time I Belong Somewhere 10Because This is My First Time Having In-laws 11Because This is My First Beach 12Because This is My First Desire 13Because This Is My First Time Visiting Your Room 14Because This Is My First Confession 15Because This is My First Intermission 16Because This is My First Life