The Reborn Skeleton Killer God Was Summoned by the Cute School Beauty

After rebirth, Jiang Yuan became an abyssal skeleton and at the same time awakened the killing evolution system. By killing strange beasts, you can gain evolution points and evolve your body infinitely. Ordinary skeletons, skeleton dragon riders, undead natural disasters, and abyssal gods of death! ..... My name is Xia Yu, and in the era of national job transfer, I changed my job to a hidden job—Singer of the Dead. On the day we made the contract, I summoned a skeleton from the unknown abyss. Look at its baggy appearance and weapons and equipment that can't even be called tatters. Something doesn't seem right. Who would have thought that I would be carried away by this stupid skeleton later...