One More Time (2016)

In both titles in the foundation is a love story, also in both main characters are members of band. The main is that guys tries to change tragic fate of their sweethearts by returning through time. The difference is that one returns intentionally and the other not arbitrary.

Jung Yeol and Na Ra fell in love with each other and got married. During their marriage, they have grown to hate each other due to their personality differences. They decide to get a divorce. A month later, their divorce will be finalized. But, on the day that they applied for a divorce, they get into a car accident. When they wake up at the hospital, they have both lost their memories and do not remember each other.

Both involve one of the leads caught in a time loop trying to change events and save the life of the other lead who has died in their present.

Also about a couple breaking up due to stresses and conflicts, where the guy aspires to find success in being a musician.

The Day After We Broke Up is a lot less comedic than Goblin but it has a very similar supernatural/magical tone to it.

You'll know what I mean once you watch it.

Both have the lead(s) trapped in a time loop to save a life/lives.
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Both are mini dramas with one of the leads trapped in a day long time loop.
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Though not the main focus of this drama, the female lead went through similar experiences and developed the same way before meeting the male lead who helps them become happy. Both have a good look on life and development.

-Time travel to save the one you love
-Both of them are really good.

Just watch it and you will see the similarity.

- Time travel
- Save the couple
- Save the girl
- Plot twist

I liked a lot "One more time" and "Tomorrow with you", so if you liked the first then will be the same for you.