Looking for Jdramas with brothers

I was hoping someone could possibly recommend a drama where the main characters are brothers or the main character has a brother he has to take care of. I know there are a few comedic dramas with brothers (I've seen some) but I was hoping maybe for one with a bit more serious tone. Anything that's recommended would be greatly appreciated.

sounds interesting....and I don't mean the actors themselves have to be brother obviously, I just mean the characters

innocent love. nagareboshi

Tatta Hitotsu No Koi: love story, but main character takes care of his sick brother.

Nobody Knows(movie): About a boy who has to take care of his three younger siblings (one brother, two sisters)

These are considered comedies, but I'm adding them in case anyone else is interested:

Himitsu No Hanazono: four brothers work together to publish a "girly" manga under a pseudonym.

Yamada Taro Monogatari: high school boy taking care of his 6 younger siblings

Atashinchi No Danshi: This one is not about a brother taking care of his siblings, but it is about a group of brothers.

Oh, and I second Ryusei No Kizuna and Brother Beat.

Ryusei no Kizuna yamapi's new drama Saikou no Jinsei no Owarikata ~Ending Planner~seems to fit this genre

Rinne no Ame - It's a special, but it's one of my favorites. It's great!

Its in a way about 2 brothers caring for each other.

http://mydramalist.com/korean-drama/1369/can-you-hear-my-heart

Big bro takes care of ill mother and lil bro( Sato Takeru).

http://mydramalist.com/japanese-drama/850/fuyu-no-sakura

Big brother wants lil sister to be happy. Its a movie, so its not a waste of time.

http://mydramalist.com/japanese-movie/641/nada-sou-sou

About 3 brothers and their cousine getting married. Its a special of 4 ep, but you can really see how much the bros depend on each other.

http://mydramalist.com/japanese-drama/2040/propose-kyodai

You want brothers? You can have like 18, but I think just half of them are shown in the drama.

http://mydramalist.com/chinese-drama/2969/startling-by-each-step

This is about a big brother who is looking after his siter and his deaf bro( Shun Oguri).

http://mydramalist.com/japanese-drama/568/summer-snow

I hope I could be of a lil help.

The only one i know is http://www.mydramalist.com/japanese-drama/85/orthros-no-inu