Vividred Operation

Akane Isshiki lives with her younger sister and inventor grandfather near the revolutionary engine that solved the world's energy crisis. Their peaceful surroundings become a battlefield when mysterious beings attack the facility and conventional defenses cannot stop them.

Her grandfather's technology gives Akane a combat suit, but its greatest strength depends on the trust she builds with the girls who fight beside her. Balancing school life with increasingly dangerous attacks, she seeks to protect her home while an enigmatic classmate pursues a purpose Akane has yet to understand.