Ninja stars

Mayuka goes to high school hoping that no one will find out that she is a very powerful ninja. But when she gets to the school, she finds out that there are a ton of ninjas (Not as powerful, but still they're still ninjas) She meets five boys, who help her with getting over her shy personality. Together they become the greatest team of ninjas in the world. But somehow, she gets closer to one of the boys than usual