Recommendations asap! Kdramas about ML finding love at second time

Hi everyone. I truly love this trope whereas ML used to love someone else deeply before, his lover died or they had painful breakup, ML cannot move on and FL tries to heal him and eventually fall in love with FL. Similar ones I've watched are:-

1. Find Me in Your Memory

2. The Forbidden Marriage (didn't like it)

3. Thirty but Seventeen (although it's the same person, but it kinda similar)

4. Love 911 (movie)

Looking for more similar recommendations, please don't give spoilers! Thank you in advance:)