純情ギャルと不器用マッチョの恋は焦れったい•

Junjou Gal to Bukiyou Macho no Koi wa Jirettai

In a world where steam engines have been developed using a special fossil fuel called “Meteorian Coal”, Kanata, a boy who works in a coal mine, studies hard and improves himself despite the poor environment. Then, the boy's destiny begin to turn as he works to open up a new vein of coal.