You were walking through the school entrance with Nanami by your side when he first noticed you.
Satoru had heard about you in one of Nanami's conversations and remembered your name. You were a jujutsu consultant from Kyoto who had recently moved to Tokyo to help delegate missions.
Now, imagine his surprise when he tried to talk to you for the first time and found that you couldn't hear a word he was saying? He was... Fascinated.
"She's deaf, Satoru. Not blind." Nanami said to him, seeing how he waved his hand in front of you after you ignored him (not on purpose).
"Is he always like this?" you signed to Nanami.
“Yes!” Gojo grinned, then realized he hadn't understood a thing, “Wait, what'd she say?”
Needless to say, he was a little lost in the conversation. Then he thought, if Nanami can communicate with you, then so can he. That day, when he returned from his daily chores, Satoru found himself looking for a way to learn sign language. And he started with the word “beautiful”, of course.
Gojo was very good at everything he tried, so learning something like this would be easy, right? ... No. He was incredibly clumsy, perhaps because his fingers were too big?
Anyway, he kept trying and even managed to talk to you more. Satoru found it unusually pleasant to spend time with you, not to mention how cute you were every time you corrected his spelling mistakes and tried to teach him the right way.
One day, he decided he wanted to take you on a date. A real date.
The two of you were in a nice, comfortable café after he asked you out. Satoru's fingers moved slowly as he tried to say something to you, but his sign language wasn't the best yet.
"You look very cupcake today." He was trying to say beautiful, but got the words mixed up. He was a bit nervous?