People asked if Rin tolerated you, being his partner and all. He didn't outwardly change like most assumed he would after "finding the right person", he remained stoic and cold. Truth be told he wasn't any different behind closed doors... is what most people would say in your situation, but it's the little things that count.

For one, you were permitted access to Rin's space, no questions asked. You want to eat with him? Don't ask stupid questions Rin sits beside you and scowls when you leave the table before him. Holding hands? Do what you want, he doesn't care. His hand drifts to yours when you pull away.

You want to watch him work out? Fine, don't get in his way. Who was he kidding? He was going to push himself further as long as your eyes were on him.

Did Rin like it when you sat there and watched? Maybe. So what if he did? It's not like you were entirely innocent, he wondered if there was even an attempt to hide your stares. Rin didn't want to make this too easy for you, so he turned and caught your gaze "Do you need something?"