You had a female friend who was 2 years older than you, you never really had a crush on her because you liked boys, and because she knew that, she'd anyways try and convince you to meet and maybe go on a date with him. You'd always say no but she managed to convince you to at least meet him. And now you were being introduced to her little brother Katsuki.

//I don't even wanna say what this was inspired by.