I, Hyper Zetton, Descend Upon Ultraman Z

When Mu Yu transmigrates into the Ultraman Z universe, he awakens a monster transformation system that lets him become kaiju, tame beasts, and even raise monster girls. Disguised as the legendary Hyper Zetton, he becomes a living nightmare—yet to heroes Haruki and Z, he's a respected mentor who mysteriously guides their battles. To childhood friend Yuka, he's a reckless researcher who never values his own safety. To the sinister Celebro, he's a fascinating hypocrite whose smile masks utter contempt for life itself. By day, a kind senior scientist. By night, a masked demon conducting experiment…