Googled what Shiritori means and it's... I won't tell you google it too, hmph
As if Otaku like us wouldn't know ! hmph
... But for those who don't know shiritori is a game where each player takes turn saying a noun, then the next player takes the last kana of that word, and say a word that starts with that kana :
example : Otaku kun says Yakitori, then Amane could say any word that starts with RI, like Ringo (apple)
the first person to say a word that's already been said, or the first to say a word that end with n like Kiramon loses.
🤓