The first original video episode will follow three of the main heroines in an original story. Bundled with the 11th and 12th volumes of the Dokyuu Hentai HxEros manga.

Kogorou Akechi is the founder of a private investigation firm known as the Boy Detectives' Club. Together, this group takes on cases both great and small. One of their junior members, Kensuke Hanasaki, is out solving a case one day when he happens upon Yoshio Kobayashi, a mysterious amnesiac boy with an inability to die. After seeing his abilities in action, Kensuke offers Yoshio a deal: join the Boy Detectives' Club and help them solve cases, and in exchange he will find a way to help Yoshio die. The apathetic Yoshio accepts this deal begrudgingly, unaware of how different his life will become. Although he does not have much use for people, he gradually begins to acknowledge the group as he spends more time with them while solving cases. Trickster: Edogawa Ranpo "Shounen Tanteidan" yori follows Akechi and the rest of the Boy Detectives' Club as they solve the various cases they are given, all while combating a hidden threat from the shadows—"The Fiend with Twenty Faces." [Written by MAL Rewrite]

Low on luck after a series of unfortunate events, You Keika works part-time to try bringing himself out of a life of poverty. After a strange encounter with a white-haired man in a junkyard, You wakes up to discover that he was killed in a sudden accident and has become a spirit. The man he had encountered, Tanmoku Ki, is revealed as the 13th Youmeshi of the Tanmoki, the highest-ranking exorcist family of China. Noticing the wandering spirit, he offers You the opportunity to form a pact: he will offer You protection from humans and in return, You will have to become his spirit shadow, keeping him safe and guarded at all times. From then on, the two face untold challenges in the spiritual world, striving to keep those around them safe from harmful spirits. Along the way, the pact they formed grows into something more; a bond that neither of the two ever expected. Behind their roles as master and servant, a lingering admiration begins to emerge. [Written by MAL Rewrite]

When Qian Yunshang's marriage to Ye Youming is arranged by the emperor, she is terrified that the bad blood between their families will lead to her being treated miserably in the Ye household. Torn between duty and concern for his daughter, Qian Aotian devises a reckless plan. He summons his firstborn daughter—her existence unknown to all but his own family—to be the stand-in for her younger sister. Due to her unusual powers, Qian Yun Xi was exiled by her family when she was a child. Deprived of filial affection, she made a life of her own amid the wilderness on Mt. Ling Yun. However, everything begins to change when she marries Ye Youming in her sister's stead. Harboring immense contempt for the family of Qian, Ye Youming refuses to acknowledge Qian Yun Xi as his wife and treats her coldly, going so far as to banish her from his palace grounds. But he can only resist her childlike charm and boldness for so long... [Written by MAL Rewrite]