Yes. A combined pack is available.
One café package will be provided with each adult ticket. Children who are admitted to the exhibition free of charge do not have the café pack included. However, you can buy as many comics and souvenirs of the legend as you wish in the official souvenir shop, as well as a suitable snack for them in the café-restaurant.
As the cost of admission to the exhibition + comic has already been applied as an equivalent discount on the ticket, you will not have the option of exchanging the value of your admission ticket for an equivalent discount in the official shop or restaurant-cafeteria.