Zongman: The only God Slayer adopted by the Nakano family

Traveling through the world of Soman, Nakano Yuu obtains the [Oldest God Slayer System] at the beginning, completes the system tasks, obtains lottery times, and draws the power of gods and various artifacts!
Just when Nakano Yuu was imagining himself hunting down the disobedient god and becoming the strongest demon king, he never expected that this was actually a bizarre world where monsters and weird things coexisted? ! !
Fortunately, I got the [Ten Powers of the God of War] and the Holy Sword Juvayus at the beginning.
Faced with five sisters with different personalities, Nakano Yu originally planned to be the only demon king in the world and enjoy life, but he didn't expect...
When the younger sister Nino returned home from school, she was haunted by a cursed female ghost named "Shirai".
Just after rescuing the second sister, classmate Gui Yanye suddenly got involved in a strange legend called "Monkey Dream"!
After finally getting rid of the monkey dream, a disobedient god was suddenly summoned from the sky above the school.
After finally dealing with the disobedient god, he thought that life was over, but suddenly a girl who claimed to be able to see "spirits" asked him for help.
Looking at the different girls around him, Nakano Yuu fell silent.
Is there something wrong here?
......