Im being a killjoy but theres this thing called moving on right?....they seem to enjoy reverting back to square one when it seems like they are finally going to what you call communication...
I mean it’s a very real thing that happens, some people can get over the death of a loved one in a short period, but some take longer, and there also people who live their entire lives never getting over this kind of grief and despair, and unfortunately there are also people who end their lives due to not being able to recover from their pain and loss. In their minds, it’s understandable that they have trouble communicating, because some part of me thinks they both have an innate fear of losing each other also, especially Shino. Shino’s already lost her entire family, she probably internally thinks it’s likely to lose Nozomi too either to another accident or an intentional separation. Nozomi also struggles because she herself is unable to manage her own grief so having to face Shino’s grief probably makes her feel worse than it should since she’s unable to provide that support she feels she should be able to.