Without the game, there is no life. Volume 4

Sora and Shiro are siblings. They are hikikomori, not working or studying anywhere, but they have become famous all over the Internet because of their gaming skills. Upon entering Disboard - a world where everything is determined by games -... they achieved several brilliant victories over opponents who possess magic and superpowers, and challenged the One True God himself.
When our heroes are enjoying their well-deserved rest in the Eastern Union, they receive a visit from a dhampir named Prem. Prem begs Sora and Shiro to save his race, which is on the brink of extinction, and for that, they need... to win in a love simulator! At first glance, the task seems quite simple... What could possibly go wrong?..