From MangaHelpers:

Akaboshi Tetsu sees an ad for a part-time job as a hero, and thinks it might be fun to be in some kind of hero show. However, he was mistaken--the ad was not for a hero show, but to recruit an actual hero! He passes the interview, and before he knows it, he's gained super powers and the ability to transform into the Red Ranger of the local group of heroes. The other heroes are Keiko (Pink), who seems to fluctuate between being a hot young woman and an old lady, a tough little dog named Cerberus (Green), a guy who looks like an ancient swordsman, Kennosuke (Blue), and the little boy Riki (Yellow) who is shockingly strong. Together, they will defend their town against villains, such as aliens! [tethysdust]