A demon slayer thus far in name only, Yuuto finally decides to take his potential into his own hands to protect his spirit friends from two rampaging demons out for their blood! But after undergoing intensive training with Himari for this purpose, Yuuto is called to battle not the bloodthirsty Tamamo-no-mae and Shuten-Douji, but his Lolita housemate, Shizuku, who has been consumed by her deep-seated grudge against the demon-slayer clan that decimated her family! Will Yuuto have to whip out his new skills against Shizuku, or will he find another way to talk the water snake spirit down from her rage?!