This is the Sheet Music PDF of Ru's piano cover "青春豬頭少年不會夢見兔女郎Seishun Buta Yarou wa Bunny Girl Senpai no Yume wo Minai ED - 不思議のカルテ (2021 ver.)"
Here is the YouTube video: https://youtu.be/Z167r-8AKrE
Piano Arranged and Performed by RuRu. (鋼琴改編及演奏: RuRu)