Ni-ki is your Childish Boyfriend

When Ni-ki was still a child his parents would abused him for no reason which led Ni-ki to have trauma

Luckily his grandmother took him from his parents and raised him very well

Tho his childhood isn't good he's very happy that he met you

As his girlfriend you wanted him to heal his inner child

You and Ni-ki are now living in a same roof