Momiji's Aku-Soku-Zan(Kill Evil At Once)! (椛の悪即斬！),¹⁾ also called Enki(Postponed)☆ (延期☆) or Jozühnwein☆ (ヨツンヴァイン☆),²⁾ is a Cookie☆ voice drama that was organized by “Jozühnwein” and planned for a 2018 release, for the Year of the Dog, but it was postponed to February 1, 2019.³⁾

The story follows a weakened fortuneteller tricking Momiji into getting revenge. In the Human Village, they tie up a young kitsune, Momiji disguises herself as him, then she flips Akyuu and Kosuzu's skirts to embarass them. Next at Kourindou, Momiji gets Marisa flustered by bringing up her 'crush' on Rinnosuke. Finally, Momiji manages to convince Shion to hide out in the Hakurei Shrine's bathroom and ruin Reimu's day.

However, Aun and Shion tipped Reimu off that Momiji is being haunted. We return to Youkai Mountain, where Momiji is about to resurrect the fortuneteller, Aya tries explaining that she's being lied to but it's too late, and the fortuneteller's revival is swiftly dealt with by Reimu and Marisa. At the end, Momiji apologizes, then Marisa points out that Aya could've stopped her at any time which angers Momiji.

The project was intended to be distributed in four parts, one part per season for the Year of the Dog, but this idea turned out to be extremely ambitious. The first part would've released in March 2018, didn't, then the preview was unveiled on August 19, 2018 as evidence that the project exists.⁴⁾ At the same time, this caused the voice drama to generate MAD videos before the actual voice drama had came out.

Before the Year of the Dog formally ended on February 4, 2019,⁵⁾ he would eventually release a prototype of the voice drama on February 1, 2019, which notably lacks an opening.⁶⁾ Jozühnwein has stated that a full version was still being planned, but there hasn't exactly been any updates on the subject, and the next Year of the Dog would be in 2030.

• Another proposed short name was Sagrada Família☆ (サグラダファミリア☆), a reference to the Sagrada Família in Barcelona, Catalonia, Spain that's been under construction since 1882.

• Momiji's Kill Evil at Once! on Niconico Douga
  • @inusuki11111 on Twitter
• Enki☆ on the Cookie☆ Explanation Wiki