"Kokoro's Treasure" "Master Detective OSherlock"

Synopsis

"Kokoro's Treasure" Seeing Kanna desperate to find her adult panties, Kokoro invites her out for a change of pace. They go to a park that resembles the place where Kanna was born, and as Kokoro listens to Kanna talk about her apprentice days...? "Master Detective OSherlock" It turns out Kanna's missing adult panties are being used by someone. Then OSherlock appears — that is, OShaki dressed as a detective. They race through Aozora Town searching for the culprit!