Mr. Bear and Carrots and Papa and Mama - S1.E8

A letter is received from Sakamoto Miyako, Yu's mother, Kippei's family stating she still isn't coming home, along with that letter there is one for Yu as well. Kippei gives the letter to Yu without looking at it, leaving him curious as to what it says. Class seats are changed and Kippei ends up sitting next to Kokoro. A large portion of the episode revolves around Yu's stuffed bear and the memories surrounding it between her and her mother.