Because This Is My First Life

It’s Ji-ho’s 30th birthday and the worst day of her life at the same time. She becomes homeless overnight as her roommate younger brother wants her pregnant girlfriend to move in. Meanwhile, Se-hee is looking for a new housemate who can follow a certain set of rules.

The morning after Ji-ho kissed a total stranger, she wakes up to find out that her new housemate whom she thought was a woman is actually a man. Rather than the fact that they kissed, Ji-ho and Se-hee are sad that they can’t live under the same roof as they are opposite genders.

When Ji-ho gets proposed by Se-hee, she becomes confused as she doesn’t know what his intentions are. Sang-goo reunites with Soo-ji, but Soo-ji has no recollection of what happened before.

Se-hee and Ji-ho decide to get married, so naturally, Ji-ho introduces her boyfriend to her family. Se-hee must impress Ji-ho’s patriarchal father in order to get his approval. Meanwhile, Won-seok tries to make up with Ho-rang by getting her the sofa she wanted.

Ji-ho and Se-hee’s parents meet each other for the first time. Although Ji-ho and Se-hee agreed on not holding a wedding, Ji-ho’s mom and Se-hee’s dad think otherwise. Won-seok still can’t understand why Ho-rang got mad.

After the wedding, Ji-ho feels like she and Se-hee have gotten closer. Won-seok and Ho-rang run into each other at the wedding. Meanwhile, Sang-goo gives Soo-ji a piece of his mind when he sees her being mistreated.

Bok-nam helps Ji-ho get a job at the café he works at. Even though Ji-ho tells him that she’s married, he keeps coming onto her. When Se-hee sees the two together, he becomes jealous without even realizing. Meanwhile, Ho-rang comes up with a plan to make Won-seok husband material.

When Se-hee learns about how Bok-nam got reported on the dating app, he looks into it with great interest without letting Ji-ho know. Sang-goo visits Soo-ji at a café near her office, but she acts cold towards him. Unaware of Bok-nam’s intentions, Ji-ho agrees to drink beer with him.

Se-hee saves Ji-ho from Bok-nam. When the two get back home together, they have an honest talk. Ji-ho, Soo-ji, and Ho-rang go to a get-together between school friends.

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.