Himekishi ga Classmate

After he and his entire class die on a field trip Odamori accepts an offer from a mysterious man to be reincarnated However his new job turns out to be that of a Slavemancer with the power to dominate the minds of others and turn them into his toys which he happily takes on Soon however his evil actions lead to a Princess Knight who turns out to be one of his previous more popular classmates being dispatched to apprehend him But Odamori of course has something different planned for their reunion