Ryouya is a total party animal with fuck buddies. He lives with Io, a cold and cool type of guy who doesn't show his emotions much, but physically he's a 'perfect fit' with Ryouya. Io doesn't normally feel much in the way of affection, but whenever he smells Ryouya's musk he just goes crazy for it. But Io's never said a word of his true feelings, not even once...