With one serial you get x products

-- HikaShop version -- : 3.1.1
-- HikaSerial version -- : 2.0.0
-- Joomla version -- : 3.7.4
-- PHP version -- : 5.6.31
-- Browser(s) name and version -- : Firefox 54.0.1

What I'm trying to do is creating a festival pass, on the festival there are many events(event is a product), and every event has a limited number of seats(product quantity).
Once a person buys a festival pass he can get register himself for a certain number of events lets say with festival pass he has access to 10 events out of 30 in total.
User cannot buy any event more than once, so with his festival pass he can have up to 10 different events to see, with one place per event.
If there are two people then they buy two serials, and each of them chooses events he wants to attend. The events don't have seat numbering, just the number of places is limited.

So with one serial you can have up to x products but you cannot get any product twice, and also once all the product quantity has been used, users cannot buy more of them.

Can you advise me how I can do this?

Ok so... visitor buys one festival pass, with this festival pass he can go to x events. He chooses those events himself, but he cannot buy twice same event. So he makes one order/transaction and for this he gets a choice of x products for this one price.

My idea was to make this festival pass a serial, and each of those events a product that is sold and limited by quantity.