My sister's friends are so gorgeous they're known as the school's "Four Goddesses." But behind closed doors at our house, they reveal a much more mischievous side. Every day is a struggle as they tease me with provocative and slightly lewd punishment games. Just how much more of this "stimulation" can I take?!

Powerful weapons and magic inevitably come with drawbacks. Fall, possessing the unique skill "Debuff Contractor (Fall Guy)," can absorb these debuffs for his party members, greatly contributing to battles. However, his party members, not believing this to be true, mistakenly believe it's all their own power and banish Fall. Desperate, Fall sets out on an adventure alone to make a living, but unfortunately encounters a dragon. He's hit by its breath and seems to die instantly—but he's unharmed!? Fall has acquired the strongest body by continuing to absorb everyone's debuffs! An encounter with a beautiful heroine who can't pull out the holy sword, battles against the Demon Lord's army... amidst the turmoil, Fall grows even stronger. Meanwhile, his party members keep failing quests in the face of unfamiliar debuffs... When their skills work together, they're unstoppable!