Chapter 212 discussion (*there is spoilers there*)
Spoiler from hi no ken Jebus:
Tenma asks Yakumo why did she do that, and tells her to apologize. Yakumo tells her let's go home and Tenma says " but eri-chan is". When Sawachika looks up they are already gone. Inside her house she hugs her dog on top of her bed. She washes the dog, Nakamura tells her it was just washed not too long ago but she tells him she just felt like it and looks like she's about to cry. There's a flashback of Tenma, Akira, and Suou talking with text saying "When they met she was a girl who didn't stop smiling. When she was around we would always be smiling from the bottom of our hearts. I stole her irreplaceable smile. Even if the pain on this cheek goes away, that time is already..."
Next day at school Sawachika is sitting on her desk and looks out the window she freaks out and opens it. Outside is Tenma writing I'm sorry in the snow, Sawachika goes outside and asks her what is she doing. Tenma tells her not to look she isn't done yet, but Sawachika tells her to erase it. Tenma tells her why if she doesn't finish writing it, it won't feel like an apology. Sawachika tells her to erase it because its embarrassing. Suou tells Akira that the two of them have been acting strange lately and Akira asks is that why they are doing this so early in the morning. Tenma and Sawachika erase the writing. Tenma tells her that at home she kept thinking of a way and this is what she came up with. Sawachika asks her what would she have done if it melted before she saw and that she can't leave her alone. Tenma then says "ehehe I'm sorry eri-chan". Akira tells Suou see they are getting along fine which Suou replies by saying she doesn't understand them. Tenma finds a dandelion and shows it to Sawachika then remembers homework that is due today. She asks Sawachika and she tells to go back inside and chapter ends with Sawachika with a face like she's thinking about something.