Theodore, the illegitimate child of Duke Blauch, who had been living a wandering life after leaving the mansion, returns only after his father’s death and his half-brother, Bernhardt, inherits the title. Upon returning, he hears a rumor that “a ghost lives in the pavilion.”

“So what I saw back then wasn’t just a dream!”

To confirm the identity of the ghost he encountered as a child, he enters the room where he met the “ghost.” However, his half-brother Bern’s attitude toward the matter seems rather unusual…

Now, the story of these two brothers begins, as they both try to win the heart of the ghost in the pavilion.