An Unrequited Love that of course gets reciprocate later. She confess to him and even chases him but he is not interested or he is in love with someone else so he rejects her everytime until she ''gives up'' or for some reason disappears from his life and it's there when he realizes that he loves her.  PREFERABLY SECONDARY COUPLES, EXACTLY like in The Legend of Yun Xi, i loved the secondary couple of that drama. She chases after him all the time and he's always running away and hiding from her, he even ran away from their wedding, lol. Then one day she leaves him to marry someone else and he realizes he loves her too and goes to stop that wedding, lol.

I've also watched:

Secondary couples
- Seoyoung my daughter. Hojeong has been in love with him since forever but he already has a girlfriend whom he loves very much and is planing to marry her, for reasons he breaks the engagment and marries Hojeong instead (without loving her). With time of course he falls for her.
- My Golden Life. Jisoo loves Hyuk but he loves her sister. He gets to really know her and fall fore her.
- Ugly Alert. Rich girls falls for the hard-working poor man.
- Father is Strange. Rayoung and Cheolsoo.
- Wolgyesu tailor shop. Don't remeber their names but they are THE CUTEST. Rich girl chases after him but he's not intersted until severeepisodes later. When they get together they are the CUTES couple.
- What happened to my family. Arranged marriage. Rich girl is in love with him.
- Ojakgyo Brothers. She loves him, he doesn't. They get drunk and have sex. She gets pregnant. They get married. Eventually he falls head over heels in love with her. A slow-burn. LOVED IT.
- Rascal Sons.
- Love Now. 
Qiming and Cairyong.
- Dream High. Pilsok and Jason. I LOVED THEM
- Five Enough. He falls first.
- Moorim School.

Main leads
- All versions of Meteor Garden/Bof. He falls first.
- All versions of Playful kiss.
- All versions of Fated to love you.
- All versions of Full House.
- Weightlifting Fairy Kim Bok Joo. He falls first.
- Strong Woman Do Bong-soon. He falls first.
- Bring it on Ghost.
- Oh my Ghost.
- A love so beautiful.
- Unrequited love.
- Goong.
- My lovely Kim Sam Soon.
- Seducing Mr. Perfect 
(movie).

A little thing called first love has unrequited but later requited love for the secondary couple but the dude is kinda frustrating so proceed with caution lol