You can choose from the following mirrors to download High-speed Happiness Vol.1:
Google Drive
MediaFire

I supply the download like this as it allows me to easily keep the links updated if needed without having to revisit every place where I shared it. If a link breaks, please let me know.
CRC: FF97D4AD
MD5: cd89ec82b8614087766470f2be7c81e1

Links last updated on 2022.04.27