The Bat-Ninja Kagura

Kōmori Wayne is the adopted son of Bruce Wayne AKA the Batman and the last directed descendants of the Legendary Bat Clan, he takes on the name Bat-Ninja to fight crime within shadows with ninjutsu until one day while battling against his arch enemy, he is transported to another world with shinobi girls as he'll soon find his destiny while gaining a harem. Lemon. Dark. Ninja!