Poster art for the event. According to なもり(mangaka), “various things done with illustrations of the Oomuro family”. She also states that there will be some Yuru Yuri goods to look forward to.

sources:

• https://twitter.com/yryr_omrk_party/status/1723899598601699468
• https://twitter.com/_namori_/status/1723902601480020083