Beware of the Shadows (Male! OP Ninja Male reader x Senran Kagura)

Y/N L/N was your average looking teen but with a mysterious past. He comes to Japan to have a normal life. he attended Kagura Academy where it was a girls only school but recently became co-ed.what society didn't know is that this school is secretly a shinobi school training shinobis. He then met a girl named Yumi whom he had fallen in love with but sadly was rejected by her after he confessed his feelings to her. conflicted with his emotions and his heart broken he returned back to where he came from and was never seen again. months later a mysterious shinobi clad in darkness is seen slaying yomas garnering the attention of Kagura Academy and it's shinobi students. Now being hunted will they ever find out who this ninja is? only the shadows may know...