Yua's lover is an incubus. But she hasn't had sex in a month and is tormented by herself.
She musters up the courage to invite him to take a bath with her, which is a huge success,
and they even have some lovey-dovey sex...
But Yua, who has a masochistic side,
is not satisfied with that at all...
When she's thinking about this, somehow Kei finds out about it...!?