Ginga Tokkyuu Milky☆Subway  

銀河特急 ミルキー☆サブウェイ, Milky☆Subway: The Galactic Limited Express

Chiharu and Makina were arrested for reckless space driving. As punishment, they were sentenced to clean the MilkySubway, an ancient interplanetary train. However, things didn't go as planned when the train suddenly took off, throwing them into a high-speed space-train adventure filled with chaos, with no plans or strategies in place. All they had was momentum.