Senran Kagura and a little bird in Japan

(This is my first ever story and I'm really excited about it) Dick Grayson, a 16-year old ninja by the name of Robin of the bat-ninja clan of the east, has been sent to Japan by Bruce Wayne, the legendary Bat-Ninja himself, to train under sensei Kiriya at Hanzo Academy. During his training he meets a team of young shinobi girls who take a liking to their new classmate. However, instead of seeing him as a fellow student, they start to take an even greater liking to him than he expected. He also encounters a mysterious red hooded warrior who seems to want him dead for reasons unknown. Will he figure out who this red hooded ninja is, or will he be killed before he can even discover his name? (All characters, art, and other materials belong to their respective companies, developers, and other sources)