Naruto: I Am Senju Tokiju, I Love Playing with Light!

After transmigrating into the Hokage world, he became Nawaki's twin older brother.

He had planned to cling to his big sister Tsunade's powerful support and live the easy life of Konoha's young master.

But while practicing the Summoning Technique, he accidentally summoned himself into a strange sealed space.

A girl named Uchiha Hikari was sealed inside this space.

Thus began the story of Senju Tokiki and Uchiha Hikari.