Chapter 8.5: The Great Detective's Last Bow

Chapter 8.5: The Great Detective's Last Bow is the first extra chapter. It sees Sherlock Holmes helping his grandson capturing Wakeman.

Trivia

 * Sherlock Holmes and John Watson make their debut's in this chapter.
 * It was hinted that Ryunosuke was Holmes's grandson in in chapter 6, but it's confirmed in this chapter.
 * The name of the chapter is a reference to the short story His Last Bow by Sir Arthur Conan Doyle. The Great Detective in the title is supposed to be Sherlock Holmes.