I found this game called opsu in the play store. The, i found this in the description.
"Opsu is an open-source version of osu! written in java and it is now on the play store"
See the bold text? It was makes me curious. So, i google it. Then, i find it. Unfortunately, i was don't have a laptop at the time.
Then, when I went up to second grade (highschool), my uncle bought this laptop. A cheap standard one, office grade, 4 gigs ram, amd a6, 128mb VRAM (maybe), around $350-$420. After that, i decide to download this game. I suddenly fall in love with o!m 4k though i'm noob (i'm just a casual player anyway). Then, recently at the time i'm writing this, i just started to play std.
I really-really want to put my hand on lazer now. (Yes, i did it. But, it's highly unoptimized. So, i will just wait the official release then)