Milan Matra: 18 books

Kuesu, who has returned to the fold as an immortal, arouses great joy and relief in Yuuto. But at the sight of her beloved Young Lord happy and in the arms of another, Himari succumbs to the dark beast that dwells within her and goes on a rampage. As a demon slayer whose duty it is to stop out-of-control...

Yuuto and company get to mix business with pleasure at a ski and hot spring resort while assisting the local ayakashi to defend against the ravenous Nine-Tails and her ally Shuten-Douji. But their fun turns deadly when their normally pint-sized enemy confronts them not in the guise of a little girl...but a sizzling hot vixen?!

Yuuto, having accepted his duty as a demon slayer, is welcomed to a slayer roundtable at the home of the first-rank family, the Tsuchimikado. However, the demon slayers gathered there aren't as welcoming to Himari. Claiming that Himari will prove to be a danger to Yuuto, they go on the offensive to...

Yuuto Amakawa's ordinary life changed drastically when he encountered a buxom feline spirit named Himari and was initiated into the world of spirits and demon slayers! Sure, life with the supernatural has brought adventure (and danger!) to Yuuto, but it's also considerably ramped up the raunch factor...