ML is dating FL but is still in love with his ex.

Ahoy mates (bc most of us pirate)
can y'all suggest me any drama or movie (any language)
where ML is dating FL but he hasn't moved on from his ex. his ex could be dead or alive doesn't matter. also ML and FL should end up happily with ML eventually falling for FL completely. please!!!!

a few examples : a piece of your mind, do you like brahms, bokura ga ita.

Not exactly the same but maybe, iirc:

• Bread, Love and Dreams 
• Fated to Love You 
• Flight to You 
• Goong 
• Kleun Cheewit 
• My Cherie Amour 
• Saikou no Rikon 
• The Innocent Man 
• The Master's Sun