Doraemon and Ninja Hattori: Clash with the Dark Ninjas!

Nobita along with his friend, goes on an adventure to find the truth behind ninja’s existence, but what will happen when along the way they have to team up with very same ninjas, they wanted to find, in order to stop the evil intention of a dark ninja organisation. What do you think will happen, will they be able to overcome this obstacle or will the evil side win?

Note: I don’t hold any rights to any of the characters depicted here.
Also the cover is not mine, if you want me to take it down let me know.