アニメ「ごちうさ」をセル画化するプロジェクトが始動　手塗りの一点物を販売
(Project to Turn “Is the Order a Rabbit?” Anime into Cell Animation Launches; Hand-Painted One-of-a-Kind Pieces to Be Sold)

A project titled “Is Your Order Cell Animation?”—which transforms the anime Is the Order a Rabbit? into cel art—was announced on March 25.

Five scenes from the series will be newly produced as hand-painted cel art and sold as merchandise. The order period runs from Saturday, March 28, to Monday, June 1 (external link).

The official “Is the Order a Rabbit?” YouTube channel has also released a video showcasing the production process of the cel art to be sold as part of this project.

Additionally, to commemorate the launch of this project, a collaboration café will be held at Nakano Broadway in Tokyo from Saturday, April 4, to Monday, June 1. ……

(Translation by DeepL)

There is link to a Youtube video in the article showcasing the cel recreation process. The narration is in Japanese though.

Collaboration Cafe site (in Japanese)

Sold by order, there are 5 scenes to select from, seems like multiple people can order the same cut and they hand paint each copy.