S.F. Liquid Planet Battle is about a high school science club on a planet in space who encounter trouble. It’s 44 pages, in full “faux-CMYK” risograph color, 9.5cm x 13.5cm.
This book is a beautiful reprint! I've done this before but I've got the format nailed. So you might have this already (but I wouldn't blame you if you wanted a fresh copy).