Because This Is My First Life

Both Dramas deals about Marriage and Relationships, Divorce, Close Friendship, Second Lead couples and delivers relationship hardships and comedic slice of life story.

Falling in love after getting married! Goong has a bit more tears and teenage drama while Because this is my first life is a bit more mature but innocent in a way as well, both are focusing mainly on the development of the main couple's relationship. Also, the main actresses look quite similar.

In both shows the leads are socially awkward outcasts. They also idolize their popular love interest.

Both dramas are sweet and about two totally different people developing feelings for each other as they learn to depend on the other while living together, although Kimi wa petto is a bit more extreme with the conditions for tenancy ;)

Both deals with relationships, family problems and friendship. They have similar vibe and you can easily understand characters because they have problems like we, ordinary people have. Also I feel like they are both healing dramas, if you know what i mean:-).

To put it simply the similarity is in

the love after marriage genre

A seemingly odd couple composed of a cold male executive who pairs with a younger female and the relationship that slowly builds between. Both dramas start with fake relationships that develop into cute romance.

The similarity lies in the
Very simple cute leads
working busy male lead
The love after marriage genre

They both same the same vibe
The main female lead s the same as the supporting lead there and have similar personalities

In both dramas, we have 3 bad$$ female leads and we also get three different perspectives on romantic relationships. "Because this is my first life" is more centered on marriage rather than motherhood.

both dramas focus on ordinary adults who are emotionally drained by work and life's expectations rather than larger-than-life romantic situations. Instead of rushing the romance, they take time to explore loneliness, career frustrations, and the quiet comfort that develops when two people begin to understand each other. Both shows excel at finding beauty in everyday routines, making the characters' struggles and relationships feel authentic and deeply relatable.

There’s a similar contract style relationship with a cold male lead and a bubbly and tenacious female lead. The friends are also a mess but interesting. Suspend some disbelief because it’s not on the same level, but it did satisfy the craving for this type of dynamic.

Yamagishi Ayumi is a single woman who wants to marry a high-spec man and have a stable life. Her boyfriend is Katsuo Ebihara. They have been in a romantic relationship since their university days, and they live together now. She always cooks for him with all of her heart, and she always puts him first, but this makes her gradually lose herself. Meanwhile, Ebihara Katsuo is a man of a patriarchal mindset, who thinks women should cook and not men. Their relationship seems to be going smoothly. Ebihara Katsuo, who thinks he is perfect, decides to propose to Ayumi Yamagishi. He doesn't have a doubt that she will say yes, but she responds, "No way."

tambem fala sobre casamento e problemas que um casal pode passar com o decorrer do tempo
é sobre um casal que se casa por conveniência mas com passar do tempo eles começam a se amar

fun, friendship based and revolve around girl friends living together. BTIMFL has more romance focus but both have similar strong female leads.