This Manga is too Pure for My Heart (KnK Chapter 13 Review)

I can't with this manga anymore... This chapter literally had me squealing even after it ended. So in the last chapter Shouko finds out that Yuzuru was the one who posted the article that led to Shouya's suspension. I'm telling you, understanding sign-language must be taxing. Do you see her hands? They're flying everywhere. You must be really good at sign language to keep up with all that. Anyway, Shouko actually gets angry for the first time and starts scolding her little sister and tells her to apologize. But of course due to pettiness, she doesn't want to apologize. Shouko then tells her something in sign language, which for some reason wasn't explained, and Yuzuru gets upset and runs out the house. Shouya actually happens to find her in the playground sleeping. Eventually after some negotiating (and Yuzuru collapsing) Shouya convinces Yuzuru to stay for inner at his house. A while later there's a knock on the door. ...