The evil sex king, Shadalh, is trying to gather all the beautiful girls in the world to his harem, but the three female magical knights intervene with his plans and his familiar is forced to save him with teleportation magic. In her haste, she mixes up the spell with one of reincarnation.
Story continues as in front of ex-evil king, now Sadaharu, a 28 years old virgin amateur H-game designer, his familiar, Sara, falls from the sky and transforms into a brown, silver-haired beauty.