The Stray Spirit is the 16th volume of Muhyo & Roji's Bureau of Supernatural Investigation manga series.
- Article 133: The Stray Spirit
- Article 134: Attachment
- Article 135: Siblings
- Article 136: The Chofu Abductions
- Article 137: Swallowed
- Article 138: A Helping Hand
- Article 139: Memories
- Article 140: What Cannot Be Seen
- Article 141: Distant Thunder
After a long and hard-fought battle against Ark, Muhyo and Roji are finally back at their office. Peace and quiet is the last thing they should expect though, especially when two detectives investigating a series of strange abductions come seeking help with their case!