The setting is a "delivery health" (dispatch brothel) service where all the girls are from "Isekai" (other worlds), and it would seem that semen is the only source for replenishing their mana in this world.
Down a certain back street, there's a brothel run by succubi called Yumemitei. Today, a popular hero decides to visit. There, he's serviced by Lafilia and Zefilia, and at Yumemitei, you're allowed to do anything you want...
A double ear licking voice work! 2 hours 25 minutes 36 seconds of playtime! Studio recorded on a KU100. Let your brain get melted by thrilling licking from both sides.