Before we get married fits your description but its very popular so its possible you must have already watched it?

[Not in any order] Some non-Taiwanese recommendations: 

Ashes of love - historical cdrama (1000% tear-jerking unrequited love by the ML)

Abyss - modern kdrama (ML has unrequited love)

Begin again - modern cdrama (I think this was ML likes first)

Legend of fuyao - historical cdrama (1000% playful ML falling first and playing with her alot lol)

Lucky's first love - modern cdrama (Unrequited love and ML chases first)

My secret romance - modern light kdrama (100% ML falling 1st and chasing continuously)

Pinocchio - modern kdrama (ML falls first and I think he started chasing her first too)

Watashitachi wa Douka Shiteiru - modern jdrama (I think this vaguely fits your criteria too lol one of my most fav jdramas though!) 

 143TWICE:

[Not in any order] Some non-Taiwanese recommendations: 

Ashes of love - historical cdrama (1000% tear-jerking unrequited love by the ML)

Abyss - modern kdrama (ML has unrequited love)

Begin again - modern cdrama (I think this was ML likes first)

Legend of fuyao - historical cdrama (1000% playful ML falling first and playing with her alot lol)

Lucky's first love - modern cdrama (Unrequited love and ML chases first)

My secret romance - modern light kdrama (100% ML falling 1st and chasing continuously)

Pinocchio - modern kdrama (ML falls first and I think he started chasing her first too)

Watashitachi wa Douka Shiteiru - modern jdrama (I think this vaguely fits your criteria too lol one of my most fav jdramas though!) 

Thank you so much for the recommendations. I finally have a nice watch list to binge this weekend. Don't hesitate to recommend more. I'll never get tired of watching this thrope, it's one of my favorites 💕

 143TWICE:

I would love to read your reviews on my recommendations! And really can't think of more to suggest at the moment 😂 

Lol! No worries. I'll get back at you when I finish them. I don't know yet how to review dramas here in MDL but I might send you a DM of my reviews 😊 

Taiwanese

In A Good Way

Love, Now

Love on a Shoestring

Pleasantly Surprised

Thailand

To the Moon, and Back

Are We Alright?

Japanese

Okaeri Mone

Kimi no Te Ga Sasayaite Iru

Koi Desu: Yankee-kun to Hakujou Garu

Uchi no Musume wa, Kareshi Ga Dekinai!

If you like these, I'll be happy to recommend more :)