UNMEI: Pantheon's Game - Chapter 77: Welcome To Nothing

After Reincarnating into Naruto World at the Warring State Era as an Uzumaki, Masahiko thought that he got a useless System. He lived for 48 years as a normal, below average Uzumaki Shinobi.

That changed when he finally knew how the system works the day of his 49th Birthday!

- Description from Novelupdates

A world filled with heroes with superpowers. A world attacked by calamity fiends. A modern world filled with wonders and dangers.

A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

Gu Xingshen! Your sister grabbed my man, you helped your sister grab my man! Your family is not anything good!

“My sister owes you, I will pay you.” “How will you pay for it!”

“Me”

“…” Later, this guy not only lost himself, but also included a little sticky bun……

- Description from Novelupdates