Manga Ani no Yome to Kurashite Imasu.

Since the death of her brother, seventeen year-old Shino Kishibe has been living with her sister-in-law Nozomi. Nozomi wants to be a person Shino can lean on, while Shino is determined not to be a burden. Together the orphaned high-schooler and young widow try to support one another while carrying on with their everyday lives.