Kuso★ (供素(クソ)★), also titled Marisa and Reimu's Christmas Party (魔理沙と霊夢のクリスマスパーティ, Marisa to Reimu no Kurisumasu Pāti), is another Cookie☆ voice drama by “Ako Atouda” that was released May 14, 2018.¹⁾ It's mainly a parody of Masashi Sada's Gege.²⁾

The video begins with a Christmas Party at the Hakurei Shrine, then shows Reimu tending to Marisa under a starry night. We are then taken to September where Marisa fights Riran and loses, then Marisa and Reimu have a relaxed chat at the shrine. Reimu tells her to see a doctor, but Marisa shrugs this off and leaves. That night, Marisa picks up a book after bathing, turns on a lamp, and blinds herself in the process.

At the clinic, Eirin warns Marisa that she'll become blind soon. Marisa shrugs this off again, but Reimu insists on staying by her side and starts crying. She tells Rinnosuke, visibly under the medicine's effect, about the arrangement, then attempts to sell him junk but gets told to leave. At the shrine, Marisa and Reimu go to bed, but Marisa gets a brief scare as she believed that she just went blind.

The next day, Marisa convinces Reimu to throw a Christmas Party so she could see everyone's faces. They visit a pastry workshop, but Milk and Flour tells them that they're sold out due to a grand reopening sale, offering a mail-order catalog instead. Marisa suddenly gets a headache, then finds herself in the back of the store with Byakuren who tells Marisa that her blindness might lead to her own “summer solution”.

Back at the shrine, Marisa and Reimu argue about serving fried chicken or roast chicken, they decide on roast chicken. Yuyuko in an Iron Man outfit hands them an oven, then Milk and Flour arrive with their ingredients. Marisa realizes they forgot to order strawberries and, for some reason, chooses to head to their pastry workshop alone. However, night falls and Reimu starts looking for her.

She discovers that Marisa was now blind and starts crying as Marisa fondly recalls Reimu's smile. We finally arrive at the Christmas Party. After Reimu tends to her, Marisa describes her blindness like being coated in snow, yet it's warm as long as she's with Reimu. To break the mood, Marisa suddenly decides to serve Reimu a drink through her mouth, but they start licking each other and it rapidly turns into gay sex.

The credits start to roll with "September" playing over it. Parsee starts wondering why Reimu and Marisa aren't present when they're the hosts. She tells Utsuho to go find them, but it turns out that the two were indeed having gay sex, so she just pretends that she didn't see anything. To finish the video, we get a scene where Marisa guesses what the two were having for dinner.

• “Kuso★” (供素★) uses the on'yomi reading of the kanji, so it doesn't actually mean anything.
  • It'd actually be “Gōngsù” (供素★) in Chinese, which is just a nonsense word for “provide element”.
  • The “official number” for this video varies, but I'll use “Kusso☆ S5” based off of this page.
• People were initially worried that Milk and Flour being voiced would ruin the characters, but it turned out to not be an issue since Kuso★ isn't really all that MAD worthy anyways.
• The story about “monks secluding themselves indoors during the summer to avoid stepping on small creatures” does accurately describe how temples were invented according to Buddhist monks.

• Kusso☆ S1 → Kusso☆ S2 → Kusso☆ S3 → Kusso☆ S4 → Kusso☆ S5 → Kusso☆ S6

• Marisa and Reimu's Christmas Party on Niconico Douga
  • Marisa and Reimu's Christmas Party (English Subs) on YouTube
• Kuso★ on the Cookie☆ Explanation Wiki