Is This Also a Hero?

I've traveled through time as Kousaka Kyosuke, a man with a sister and a house, and unexpectedly discovered I've become a sister-con man... "A rift has opened, allowing the host to travel through time. Simultaneously, an invasion from another world is imminent. Three hours remain before the invaders destroy the world. Please choose a role to defeat the invading monsters." The sudden arrival of the hero role-playing system is a revelation. Role-playing list: Darkborn Sword Demon Aatrox, Childe Tartaglia, Demon King Muzan Kibutsuji, Yasha Doflamingo, Villain Savior Dio Brando. Kousaka Kyosuke: ?? Are these characters really heroes who can save the world? Aren't we really all working together to destroy it?