Sushiro collaborates with "[Favorite Child]"? "Uriaoi! Post a live image with the sentence

Sushiro collaborates with "[Favorite Child]"? "Uriaoi! Post a live image with the sentence
Sushiro's official X (Twitter) account suddenly posted images of psyllium and concert venues. Is it a collaboration of the anime "[Pushinoko]"?...

The linked article is in Japanese.