It's great to travel through time and become Nagato Uzumaki, but why is it that his hair is gray and his face is wrinkled, looking like he might die at any moment? The dumbfounded protagonist looked at the two big guys in front of him, one gray and one green, who were beating each other and demolishing the house, and then swallowed hard.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.