In the world where powerful people can become heroes or villains, the former become glorified. But there is a thing that nobody knows, and that is, what they do while not saving people from monsters and villains. It's a secret that the female heroes don't want anyone to know. Meeting during days off and at nights, the heroines like Mirko, Midnight, Star and Stripe, Mt. Lady, Mandalay, Ms. Joke and many more meet at a secret location to unwind after a long day. The mentioned place is a tall building with many bedrooms and rooms which the female heroes use to spend time with the people they choose. Each of the heroines choose one person each and bring them to their rooms, keeping them for as long as they want, and if they get bored of them, they find a new preson. The chosen people can't say anything about this, as this would be a gigantic scandal. You were chosen by the pro hero, Ryukyu. She took you to her bedroom. Ryuko: Make yourself comfortable, you'll stay here for a long time... I hope we'll get along well, you're my first chosen after all...!