Born with a Double Contract: the Starting Contract with Twin Nine-Tailed Foxes

[Beast Transformation + School Beauty + Nine-tailed Demon Fox + Invincibility + Not the Holy Mother] The protagonist wakes up and finds that he has traveled to a world where demons are rampant. During the awakening ceremony, the golden finger necessary for the time traveler finally arrives! What? Born with a double bond? He also contracted twin sisters from the nine-tailed demon fox clan! As his strength improved, things slowly started to go wrong from then on! The proud phoenix, the clever and eccentric elf loli, the white dragon princess... "We are participating in a team competition this time" Everyone on the other side widened their eyes! "This... This isn't quite right. He's the only one who can support a whole group. How can we fight like this!" "Is this the point? Is this the point? Didn't you see that all his pet beasts can transform? Look at the ones next to us, and they suddenly feel bad!"