Bocchi the Rock! Side Story: Kikuri Hiroi's Heavy-Drinking Diary manga volume 1 features story and art by Aki Hamazi.

Kikuri Hiroi—genius bassist of SICK HACK, terror of concert venues, eternal deadbeat, and all-around poor role model—has long held that there's no problem you can't drink your way out of. Whether it's the failing economy, overdue rent bills, or just plain ol' social anxiety, a quick trip on the spiral of happiness will help everything work itself out in the end…right? Surely her personal life isn't a total disaster, right?! Find out in this spin-off to Bocchi the Rock!