Manga Story Idea Contest! Give me some good stories for a manga that I could write.

Rules:

Must have a main character

The character should have some sort of background or story behind them.

No cussing in the story, and has to be suitable for all ages (I mean, sure fighting and some bloodshed is fine, but don't go TOO overboard) If your story does have any mature-ness to it (Hentai, Characters that show off a lot of skin, ((Mostly girls)) or pervy characters), then put the words "Mature Rated, read at your own risk." in the title.

Some kind of setting, preferably somewhere in Japan.

It can have magic or monsters, or it can be realistic fiction.

If it takes place at a school, Put some part in the story about the actual school. (Some manga or anime has a school as the setting... and they don't even DO schoolwork! That really annoys me, because here we do work, work, and work!)

Not too complicated... I have limits. Remember that I'll be making it into a manga.

Have fun, and happy writing!