Holly thinks about the note that Mike never gave to Will. She remembers that weird rock song Mike and Will had been listening to on Christmas night, and how Mike seemed to play that song again at every given opportunity. She remembers Will's soft smile when Mike whispered something in his ear. She remembers things from further back, like how Will was at their house more often than Mike's other friends. Or how they used to hold hands and hug all the time before- Before. Or: Holly watches from afar as Mike Wheeler slowly comes to terms with his love for Will Byers.