Takai Tsukasa is obsessed with the female body, but what he longs for more than anything is to find the perfect armpits; he really knows his stuff, the "stuff" being the beauty of women's shapely armpits). One day, an elegant, blonde demon appears before him, and she has exactly what he craves. A bold, uncensored fetish fantasy unfurls between Tsukasa, his neighbor Chika, the demon Roselia, and a cast of demon girls who are hungry for more than just souls and power!