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Ji-ho starts developing feelings toward Se-hee and feels happiness from being able to see him every day. However, it does not last long as Se-hee’s mother pays a surprise visit. Meanwhile, Sang-goo cannot resist Soo-ji.
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