These Reincarnators Are Sus! Sleuthing in Another World
B66/100Web serial by AceGreen
Sleuth out the reincarnators. Retrieve their jeweled eyes. Stop this world's destruction. That is Ailn's reluctant mission — except he is not really Ailn. He is an impostor: a detective from another world who cannot even remember his own name. Summoned by a young god with a terrible habit of hiding crucial details, the detective must use his past-life instincts and emerald eyes to unmask other reincarnators — all while wearing a mask of his own. Now posing as a noble son whose family has protected the empire from shadow beasts for generations, he faces a complication: the original Ailn had a trash reputation, was just killed, and the prime suspect is his sister, the duchy's beloved future Saintess. First things first: time to solve his own murder.