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.