This was back when I was playing Touhou. Basically, this one kid on a Discord server was complaining about hard osu was. So I said "But is it harder than Touhou?" And they said yes. Despite not having played both games. So I decided to give it a shot. Got a little swept off my feet, and kinda used mouse buttons instead of keyboard, which sucked. But when I really got the hang of it after switching to keyboard, osu became genuinely fun and I quickly sinked a ton of hours into it.