Dirty Red.

Yoshida, a 58-year-old man, works part-time as a traffic control guard. He once fought alongside his comrades as the leader of Inazuma Sentai Thunder Five, protecting the peace of the Earth. However, through his own foolish actions, he ruined everything. Plagued by regret ever since, Yoshida sets out on a journey of atonement to seek forgiveness from his former teammates.