I don't really understand most of what happened, but as long as there's some good yuri I'll take it
Shiritori is a Japanese game where you try to think of a word that begins with the same letter(s) that ended the word your opponent used. So if your opponent says "watashi", you need to think of a word that starts with "shi". You lose if you say a word that ends with a single "n", as there's no Japanese word that begins with "n" by itself.
