I Picked up a Crippled Mute, and One Day, He Was Able to Speak.

The Male Protagonist Is Mute, and Every Time He Quarrels with the Female Protagonist, He Makes Trembling Signs.

I Beg You That the Male Protagonist Is Mute and the Female Protagonist Covers Her Eyes to Avoid Signing When She Is Angry.

The male protagonist is mute and the female protagonist gets angry after an argument with him, so she covers her eyes to prevent him from signing. He is so anxious that he starts to cry and goes to pull the female protagonist away. However, the female protagonist later becomes soft-hearted and listens to his explanation (the male protagonist has a somewhat low self-esteem and feels that he is not worthy of the female protagonist).