Kdrama that gives the melancholic vibes like Because This Is My First Life?

As the title says. I'm sorry if my recommendation request sounds weird, but it's been a while since I watched a Korean melodrama that gives me the 'sad' and 'longing' feelings like this one. My English isn't that good but I will try my best to explain the types of dramas that I'm looking for :).

It's not the storyline that I'm searching for but the vibes this drama left to me, so I'm open to any kdramas (except the 18+ kdramas). One thing I really love about BTIMFL is that whenever the characters are struggling with their lives, it's always on night settings and they'd insert some sad music background. I know it doesn't make sense but dramas like this gave me such warm and nice feelings :).

I really appreciate if every one of youcould give only one recommendation at one time, because I might get a little bit overwhelmed to see so many dramas recommendation. I'm looking forward to see the recommendations. Thank you so much in advance. Have a great day :).