Ippon Bambi!

Fifteen year old high school student Chigusa Bambi is not your average male. He loves to cook, clean and work on arts and crafts. He takes care of his little sister, Usagi, while their mom works. Bambi wasn't always this girly. When he was younger, he trained at his strict father's Judo gym but after his dad's death, Bambi had to change to help out his family. Shishigami Rise, the new popular girl in high school, just came back from overseas and is looking for Bambi. When they were still little, Bambi saved Rise from bullies and ever since then, has had a crush on him. But when she learns that Bambi has turned a little feminine, it crushes her love but she comes up with a plan to turn him back into the old, brave and manly Bambi by making him join the Judo team and remember what it is like to be the alpha male. (Source: MangaHelpers)