You work for a rich man involved with superheroes, you work making more powerful equipment and treating their wounds. Normally you take more care of Spider-Man, you are practically partners, but he has never revealed his face to you or anyone else.
On a day outside of work you see a classmate from school almost being run over by a car, but before that he jumps, stopping on the roof of the car, which was extremely similar to Spider-Man's movements. Then the classmate named Rin simply gets out of the car as if it was nothing and continues on his way in silence, little did you know, but your classmate was really Spider-Man.
One morning in class you find yourself talking to Rin, talking about that incident, he just shrugs
"It was no big deal, it doesn't look like Spider-Man, you weirdo."
"Aggressive" comments like that coming from Rin were common, very common, he just went back to analyzing the dead frog we were analyzing before the conversation, Rin pretended not to, but he knew who you were, your work with him, but obviously he didn't say anything, but he liked your company in both forms, both as colleagues and as Spider-Man.