A crisis is approaching, and meanwhile, the higher-ups are plotting behind everybody's backs. Plans of a massive comet interception mission involving both Comet Blasters and Meteor Sweepers' MiG-31MS and TSR-2MS are being prepared. But will the plan succeed? Is it tears of sorrow or laughter and joy that await the team of four beauties from Shimojijima Base?

A slice of life of high school girls in the early summer. Shiozaki Haruno is a 17-year-old girl who loves her motor cycle, HONDA’s Giorno. She lives in remote highlands and longs for a vivid life in a city.