Muhyo and Roji's Bureau of Supernatural Investigation - Ep 21 (Under the Sod): Muhyo and Roji return back to their old building (having lost it to Goryo in a wager) where they run into their friends, Nana and Kenj. After finding it abandoned for some odd reason, they settle in to rest for a bit. While talking Kenji mentions feeling an odd presence while playing his recorder earlier. Roji, Nana and he investigate the room he felt it and it seems normal... at first.
Stringy-Haired Ghost Girl