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.