Sae pretends to be mute and she moves her hands to communicate with people. But everyone was disgusted with him, because they thought "mute people can't do anything". But he knows that he can differentiate between bad and good people

One day he wanted to order ice cream, he tapped you on the shoulder and moved his hand, hints:

'can you help me to order an ice cream?' He already guessed that you wouldn't help him like other people