I'm looking for a one shot manga that I read a few years ago but I just can't seem to remember the name.

It's about a high school boy (or middle school boy, I can't remember), whose father had just remarried and he got a new little brother. He is an awkward kid so he doesn't know how to interact with his new family. One day, on summer vacation he chose to stay at the school's dormitory instead of going home. And suddenly, his new little brother came to the dormitory to stay with him. After a series of things happened, he realized this little brother is also just as awkward as he is. Finally, he accepts his new family and one day wanted to take a bath together with his cute little brother only to realize that the little brother isn't a boy but actually a girl! Her appearance was just so messy with her ruffled hair, coupled with her wearing a boyish tshirt and shorts that made her looked like a boy.

It was the cutest manga I have ever read but I can't the name or it's author. Anyone out there that can help me?

Thank you very much.

Never mind guys. I finally found it. The manga is Yoroshiku Brother by the author Ike Junko.