I was watching YouTube on my TV when I first discovered osu!, when in a recommendation of videos to watch, since I was listening to a lot of music on YouTube, I saw a thumbnail with an anime girl in it, with circles in the back. This video was Heibel's FC on "Blood Sugar". Having my curiosity piqued, I watched the video, and was slightly confused at what I was watching. I saw that the name of the game was called "osu!", and decided to look it up in the search function. After that, I saw a video of "Caramel Heaven" and, since I was already using the alias "keremal" at the time, watched that stuff too. It blew my mind, both in trying to figure out why people used two different keys to click circles, and how they got so good at doing it. I got a bit frustrated at trying to figure out, so I left the game in the back of my mind. That is, until a classmate from last year started playing a weird game with keys, that looked oddly enough like guitar hero, but with flat plates. I asked what the game was, and it blew my mind.
"Wait, that's 'osu!'?"