Daily Life as a Shinkansen Transforming Mecha

Ten years ago, they appeared without warning—machines whose technology defied everything humanity knew. Now an unknown threat looms over Japan, and only the Super Evolution Research Institute stands between civilization and catastrophe. Armed with transforming mechs built from the nation's most advanced bullet trains, these next-generation defenders must protect not just passengers and schedules, but the entire country. Yet for our protagonist thrust into this high-stakes world, survival means navigating daily life inside a sentient Shinkansen robot while humanity's fate hangs in the balance.