My seduction system

Micheal who had lived sixty lives never got the chance to have sex as each life one way or another he always get killed so he suppressed his desire for it and lived live to the fullest by learning all sort of techniques in live but in his sixty first live he met the seduction god who gave him a failed experiment of a system .(R18, fantasy, haverem,weak to strong ,demonic mc,incest, incubus.