“Unknown” is a mysterious enemy that suddenly appeared a long time ago. As a countermeasure, the “Evolutionary Railway Development Agency” (ERDA) has developed the “Shinkalion” robot that transform into bullet…

After a long day, high schooler Shintaro Tokumitsu’s plans for relaxing in his studio apartment take a turn when he discovers an angel on his balcony. The divine girl, Towa,…