"Sutopuri With!!" The event "Cultural Festival! Riinu-san, Ruuto-san, and Gel-san appear in butler uniforms

"Sutopuri With!!" The event "Cultural Festival! Riinu-san, Ruuto-san, and Gel-san appear in butler uniforms
flaggs and STPR are available on the iOS/Android app "Sutopuri With!!" The event "Cultural Festival!...

The linked article is in Japanese.