[Machine Translation] In a world where everything is decided by games (Disboard), the strongest gamer siblings, who have fought many battles in a row against numerous enemies who make full use of magic and supernatural powers and still remain undefeated, have never been able to clear a game. However, there were actually only two games that they had never completed.... While enjoying an elegant vacation in the Eastern Alliance, they are visited by a vampire girl named Plum. Sora and Shirou are assigned to save the species from a crisis, but the game they play is one they have not yet completed: a real-life love game. This is the fourth installment of the popular otherworldly fantasy series, "Sora and White"...?