Just watched ep7:

Noticed this scene in the OP:

Nago and Nago?
He blames himself?
Or is there another him?
Past and present?

First time 2008 didn't appear Shima exercising.

1986 and 2008, does anything happen in between?
I wonder did Wataru try to paint the violin with paint made from blood?

Nago is really possessive.

Some wild thoughts:
Could 1986 lead to a Otoya-Aozora Org betrayal?
How about 2008 lead to a father vs son?