The jougon eye from: boruto: naruto next generations this eye allows boruto to see strange dark chakra which was a type of seal on his classmate's back that allowed her to put chakra over people to make them act evil also allowing her to summon nue a gigantic beast that attacked their village,boruto's other classmate mitsuki wet to terminate her.

as he persued he locked boruto up and boruto broke free to follow mitsuki who was hunting their classmate,she was the class rep and they stopped her and then the jonin of the village had to keep her in a secure place if you have any question post in the comments below thats all for now.