In a distant future where humanity is divided into Terra and Ness factions battling in space, the daring pilot Yamamoto Yohko finds herself transported through time after being caught in a temporal anomaly during a mission. Struggling with amnesia, she awakens believing she is a regular high school student. However, a series of events lead her back to her starship, TA-29, where she reunites with her friends to engage in a war resembling an arcade game, complete with 100 yen ignition costs.