Girl gets pregnant but doesn't tell Guy and when he finds out years later...

Some examples of what I'm looking for would be:

• - Autumn's Concerto
• - Loving, Never Forgetting
• - Le Jun Kai

Basically, I want two people who were in love (can be one-night-stand,etc., but previous relationship is just as fine) and the girl gets pregnant, but for some reason (Memory loss: Autumn's Concerto), she doesn't tell the guy about their child. Then, when he finds out, he goes ballistic! I'm really looking for that angst that grows into love. Any recs. are welcome and Thank You in advance! Have a blessed day ;)

Let me see..
only you - korean drama
Giant - the little sister story

New Tales of Gisaeng, but pregnancy is part of older generation story.

Fated to Love You (?) She eventually tells him while she's pregnant. One of the first Taiwanese dramas I've watched (and there's a Korean remake, but I prefer the Taiwanese version)  

Wonderful Life (k-drama)

Secret , there isnt pregnancy but angst turns to love 

http://mydramalist.com/7761-secret

Boysitter
Sunny Happiness
Legendary Witch (it's a side couple/story // he knew but thought she aborted)