Riddle Garden

"Everything in my world is here." Bordered by grand walls was a chalk-white castle that stood in the middle of a vast garden. A stream flowed within the forest that surrounded the castle and an old water mill stood there. A girl named Colette lived in that castle and wanted for nothing. Besides Colette, the only others that resided there were her pet rabbit Mashiro, her butler Elick, her governess Claire and some other servants. Ever since she could remember, Colette didn't have a single family member. She had absolutely no idea why she was in a castle, what her social status was and who she exactly was. One stormy night, five men visited the castle. All of them claimed that they were invited to the castle to be "selected by Colette". While bewildered, Colette then received a letter. That letter said that one of the invited guests was no longer able to come due to being attacked by ruffians. It was certain that exactly five guests were invited. Yet, somehow, there were five guests here despite what the letter said. "It seems that an uninvited guest has made their way inside." [Translated from The Official website]