I loved the drama "I'm in charge" where a boy was in charge of his little sisters. I liked innocent man (Korean) and I saw the princes prince.Any drama where there is an older brother  who is protective over his little sibling

Romance
Ugly Alert
Night Head
Heart to Heart
Ouroboros (they are both orphans who grew up taking care of each other, so not blood related)
Yamada Taro Monogatari
Angel Eyes, though its not really the focus.
Stars Falling From the Sky
Yasuko to Kenji

Yeeees these are my favorite: they are super sad tho but Must Watches!!! 

East of Eden

Wakamonotachi

Brotherhood of war(movie)

My annoying brother(movie)

Brother beat

Iris( drama special)

Rinne no Amme

Breathless (2003 korean drama) is one of my favs

Sweet Combat

Season Love (maybe)

From survivor to healer (maybe)