Ho Goo's Love- He's a cutie patootie, she's very cold and reserved.
Strong Woman Do Bong Soon- Although she's not actually cold, he's the one that shows the most emotions and she's the reserved one.
Beautiful Gong Shim-Again she's not really cold, but is a lot more serious than the male lead. He's very unique lol and he falls in love first in a very cute way. She warms up to him and his quirkiness in time.
Eternal Love- She's cold, he's not. I would not call his love puppy love but he pursues her and makes her warm up to him. Is a Chinese drama.
Flower Boy Next Door- Another cutie pie male lead and a veeeery introverted female lead.