Saiyan to Succubus

What if Kamisama had never cut Goku's tail when he was training with him? What if the headmaster of Yokai Academy offered a good deal to Kami who couldn't refuse it? Thanks to Kami decision, Son Goku is enrolled in Yokai at his sixteens. There, he'll meet a lot of enemies and some girl who slowly begin to fall for him. Update!: The main pairing remains, but it will be also a Harem.