Looking for Kdramas where ML never ever never gives up on the FL

As the title says I am looking for Kdramas where the ML is completely smitten and just doesn't stop following the FL to try and get together with her until the very end. I mean literally where nothing stops him from trying to be with her. I really dislike noble idiocy or when ML walks away when he is jealous or thinks that FL doesn't care about him. I want him to persist no matter what. Can be any genre. Some examples:

Perfect Examples of what I am looking for:

The Greatest Love

Heirs

What's Wrong with Secretary Kim

The Last Empress

Empress Ki

Examples that really disappointed me, they have started good, but the ML gave up at some point 

Protect the Boss 

Boys Over Flowers 

Reply 1997

When A Man is In Love 

Moon Lovers: Scarlet Heart Ryeo

Thank you very much!

 emaureeng:

Secret Garden. That said, he is adament for most of the drama that he is only interested in an affair, after which she is expected to disappear into bubbles like The Little Mermaid. Definitely obsessed, though.

Thank you. Yes, I have watched, his behaviour was brilliant, but it was somewhat bittersweet, because of his belief that it's not permanent. 

 Shxxkz199:

Encounter 

Haven't watched this one yet, thank you.

• Boku unmei no hito desu
• Well intended love
• Sekai ichi muzukashii koi
• Secret Garden
• I'm Sorry I love you
• Kill me Heal me
• Healer