I'ts great that you liked it!
The chapter ends exactly where you said it would. The new sprites we added in this episode are variations of Maske's sprite; if you've played through all the chapter's options with them, you'll know which ones I'm talking about (👀🤭). If not, just check out the options you might have skipped. There’s also an edited sprite of Kyeran at the end of one of the story paths involving Akane.
The minigame is on Kyeran’s story path, which branches off a bit from the others because of the plot.
We always encourage to play through all versions of the story—even if they don’t feature your favorite characters—so you don’t miss a single detail of the story <3