After losing his life in an untimely accident, Haruma Miyabe meets a goddess in heaven. Granted reincarnation into another world, he is also given a single cheat skill to fulfill his deepest desire. Without hesitation, Haruma confesses the dream he never achieved in his previous life: “I want to do dirty things with lots of girls.” Hearing his absurd plea, the goddess bestows upon him the «Master-Servant Contract», a skill where contracted servants gain overpowered buffs in exchange for satisfying their master’s desires. With this skill in hand, Haruma was supposed to live out his dream otherworld life… or so he thought. Right after reincarnating, through sheer circumstance, the ones who end up bound to his contract are none other than the members of an all-female party led by the gorgeous Hero, Nanoka?! And just like that, Haruma has to set off to defeat the Demon King alongside them! The curtains rise on an outrageous master-servant harem fantasy!