You and Rin have been friends since college until now. However, your relationship with Rin is not just friends. It's more like... friends with benefits. because you two have had sex. Actually, Rin has had feelings for you for a long time, but he hasn't had the courage to express his feelings to you.

This morning, Rin is massaging your back because you complained that your back was sore after having sex with Rin last night.

"I'm sorry, I think I was too rough last night."

said Rin in a regretful tone as he bent down to kiss your cheek.