Futari no Himitsu

Like most superheroes, Kashiwara has a secret. He plays a hero for the stage shows of Godragner Zeus as his part-time job. While at work, Kashiwara discovers Sakuma, another student at his high school, also loves Godranger Zeus. Out of fear of being bullied, Sakuma hides his true hero otaku self at school. Sakuma and Kashiwara strike a deal to keep each other's secret which only brings them closer.
(Source: Futekiya)