Yakuza Kiwami has released on Feb 19, 2019. And if you want to order the game, you should get the pre order bonuses, here is the step by step guide on how to access the pre order bonuses.
Go to your library and right click on ‘Yakuza Kiwami’
Click on “Properties”
Go to ‘Local Files’ and click on ‘Browse local files’
Once you do that, all your pre order bonuses will be in the ‘EXTRAS’ folder including the manga
That’s all, you can unlock those bonuses. Hope you have a nice game.