Succubus Order

A protagonist lives a modest life with their younger sister Haruka until she suddenly transforms into a succubus and vanishes, challenging the player to a chase. The protagonist joins a succubus-slaying guild to find her in a world where the male-female balance has collapsed and succubi are abundant. In this harsh world where defeat means sexual domination, the player must navigate guild politics, criminal encounters, and succubus threats to locate Haruka.