Artist’s name is written on the top-right Creeeen (jjang)
[gelbooru](https://gelbooru.com/index.php?page=post&s=view&id=5394189)
He also did another animation of Kirisu Mafuyu
[gelbooru](https://gelbooru.com/index.php?page=post&s=view&id=5648533) | [pixiv](https://www.pixiv.net/en/artworks/85399234)
