Summary:

5 times Cliff Marlow realized something had changed with Ilya Rozanov leading up to his transfer to Ottawa + 1 (what he decided to do about it)

or: canon compliant but slightly canon divergent, set in between the events of Heated Rivalry and The Long Game

or: Cliff Marlow's perspective of Ilya's last season in Boston while him and Shane are boyfriends

or: Cliff Marlow is not the sharpest tool in the shed, but he's a loyal fucking friend