Douman also launched the How Many Light-Years to Babylon? manga in Young Champion Retsu magazine in 2017 and ended it in 2019, and Akita Shoten published one volume for the manga in 2019.
Douman launched The Voynich Hotel manga in Akita Shoten’s Young Champion Retsu magazine in 2006 and ended it in March 2014.
How Many Light-Years to Babylon? won the Best Comic Award in the 51st Seiun Awards in 2020.
The manga centers on three friends who meet up at morning to get to the bottom of their town’s “seven mysteries.”