Akuma no Riddle doujinshi by PURE circle (Minakata Sunao) Irrelevant to the main plot

12-year-old Aoyagi Ritsuka is a troubled child. He has no memories of his life until the age of ten - causing his excitable and verbally-abusive mother to constantly berate him, demanding that he leave and return the 'real' Ritsuka to her. For the past two years, his older brother Seimei had been his devoted friend and protector - the only person who accepted Ritsuka's 'new' self. Recently, however, Seimei was found dead under mysterious circumstances. Soon afterward, a man named Soubi appears before Ritsuka, claiming to be Seimei's 'friend'. He informs Ritsuka that his name is "Loveless", and that he is a 'sacrifice' - while Soubi is his 'fighter'. Since their first meeting, Ritsuka finds himself drawn into a bizarre secret world where teams of two; the 'fighter' and 'sacrifice', combat each other using mystical verbal spells. As his involvement in this new life deepens, Ritsuka unearths many shocking and disturbing facts about himself, Seimei and Soubi; thus, he resolves to discover the truth behind his brother's murder and his own inexplicable amnesia.

Volume 3: Prince and Princess: 01. Prince of Stars by Minekura Kazuya 02. Mushroom and Kappa: Arcana compilation for princes on business trips by Magami Guriko 03. Flower King by Kouga Yun 04. Rose Princess Destiny by Kinoshita Sakura 05. The Window of Rain by Takayama Shinobu 06. My Knight is a Princess by Kosugi Mayu 07. The Beggar Princess by Ueda Shinshuu 08. The Dawn Outside Heaven by D. Kissan 09. Princess Academy by Mikawa Verno 10. Princesses by Kari Erika 11. Our Majesty's Tactful Words by Kisaragi Yoshinori 12. Heart-Racing Engagement Meeting by Saeki Yashirou 13. Listen to the Song I Sing by Mizutani Yuzu

The anthology features works by mangaka from Ward and Comic Zero-Sum. A new volume is released every four months. Volume 1 : Butler 1 1. Spider's Nest by Minekura Kazuya 2. Nice to Meet You, Young Lady by Kouga Yun 3. Holly Green and White Little Garden by Takayama Shinobu 4. The Situation of Goshogawa Yuzuru's Magnificant Mansion Creation by Miyamoto Fukusuke 5. Butler of Worry by Higashiyama Kazuko 6. Elevenses by Mikanagi Touya 7. The Incident of the Butler's Birthday Project by Saeki Yashirou 8. Le Droit d'aimer by Haibara Yaku 9. Young Lady's Butler by Yoneyama Setsuko 10. The Melancholy of the Irritable Boy and Butler by Kikuta Yui 11. The Moon and the Visitor by Nanjou Tsugumi

Satou is a vampire who fell in love with a human, Kumiko. But his love was spurned so he vowed to come back in 50 years. Years later, Kumiko is now an old lady with a granddaughter, Tanaka, a high school-er who is a splitting image of her in her youth. Satou has now infiltrated Tanaka's high school in a mission to make her grandmother fall in love with him. Chapter 0 was part of Arcana 04: Vampire as "Crossing the River".

Volume 4 : Vampire 1. Sleeping Vampire by Kinoshita Sakura 2. Mushroom and Kappa: Arcana compilation for vampires on business trips by Magami Guriko 3. Crossing the River by Kouga Yun (Chapter 0 of Satou-kun to Tanaka-san - The Blood Highschool) 4. A Shower in the sunshine by Omote Sora 5. Urban Vampire by Bikke 6. Sky Burial by Takayama Shinobu 7. Today's Dining Table by Saeki Yashiro 8. The Aegis of the Coffin of Time by Yugyoji Tama 9. Forest of Nobility by Kayase Shiki 10. Chiyo-sama! by Shindo Arashi 11. Strigoi Kingdom by Serikawa Mame 12. The Catharsis of Truth by Inui Miku 13. Blood Donation Advice by Igarashi Ran 14. The Novice Vampire by Amamiya Azusa 15. A Gentle Temperature by Kisaragi Yoshinori

Volume 2 : Rebel and Phantom Thief 1. Candy by Haibara Yaku 2. "Such a Story" by Mazaki Haruka 3. Flies by Minekura Kazuya 4. Arabiana by Mizuhara Kenta 5. The Ancient History of the Three Thieves by Takayama Shinobu 6. The Adventure of Captain Arco Iris by Tsutsumi Shouko 7. Skyhigh Tension by Fujimura Ayumi 8. Mushroom and Kappa: Arcana compilation for thieves on business trips by Magami Guriko 9. The Lonely Mountain Robber by Tachibana Ayun 10. Lanekeeper by Fujiwara Yuu 11. Moonlight Honey by Shindou Arashi 12. The Unlucky Pirate by Asada Yasuka 13. Strobo Rider by Kouzuki Reo 14. Moonlight Dance by Kouga Yun