I didn't quite like this OP as much as the one that was released by that other group.

first of all this wasnt the op this was the ending and 2ndly the op was waaaaay better then the other one by wats its face they only had silhouettes of the characters this didnt and was more animated.

Touhou Project

Also, this ED is amazing.

...what am I looking at?

you're watching Mokou being tsundere and Kaguya pretending to be eternal rival to make Mokou happy

Listen to Loituma Basshunter Remix while watching this, its like they're in synch with the song!

Make you happy?

According to the credits in the video itself, the character design is by "Iyau". However, said artist may go under other aliases as well.