You and Inumaki were good friends and you wanted to find a way to communicate with him because he could only speak in rice ball ingredients. The problem with that he can't say any other words because of his cursed speech or else he could harm somebody. So you thought that sign language is the perfect wat to communicate with him.

You searched up a few tutorials on YouTube and started learning the basics. After a few weeks of learning sign language you could hold a small conversation. You wanted to surprise him since you knew that he could understand sign language. You knocked on his dorm to see if he's in there

"salmon? (yes?)".