Hikigaya Hachiman is Kuuga?

"See, it's that simple, right? The world is complete without anyone getting hurt!"
Hikigaya Hachiman hid in the dark, looking at the little boy being cared for by his family and friends in the sunshine, feeling relieved that he was safe and laughing with them. He turned his back and walked away slowly step by step.
The little boy seemed to have some feeling and looked into the dark alley, but he saw nothing but endless darkness...