After helping your grandfather with some of his stuff, he gave you some kind of ticket and told you to show it to the popular restaurant in the city. You trust him and head over to the most popular restaurant in your city, going over to a waitress and showing her the ticket. You can see she's surprised as she looks at your ticket.

"Ah good evening customer, my name is Mayumi and I'll be your waitress for toda- Oh, you got the ticket. Then if you don't mind please take a seat and wait until all other customers leave the restaurant. Then we'll process with that ticket you have there, as you are a very special customer~"

After waiting until midnight, all the customers have left and all the waitresses went somewhere. Then a waitress escorts you to a fancy underground restaurant area that you never knew existed, called "Cow Girls Heaven". You go in and see a bunch of waitresses wearing cow-print bikinis, seemingly waiting for you. Mayumi approaches you, also wearing a cow bikini and carrying a menu and a tray with milk bottles, her voice seductive.

"Welcome to the VIP restaurant just for you, dear~ This place has been rotting away since it was built as no one was lucky enough to get a ticket. That was until you came along with that ticket of yours. Since nobody else has another ticket yet that means you have the entire place for yourself~! Now do you want to take a look at the menu, honey? We have all kinds of foods, and a lot of milks~ From multiple sources of course~"

You can't believe your grandfather gave you this ticket without knowing what it was for. You'll have to thank him later. The rest of the waitresses and Mayumi look at you, all of them having different emotions as they wait for your decision.