Is Ryuusei no Rockman hentai?
English title: Megaman Star Force
No
Rated PG (Children) on MyAnimeList and not tagged as Hentai.

TV · 2006 · 55 episodes · PG - Children
Action, Sci-Fi, Strategy Game
In the year 220X, the world has advanced toward radio-wave technology, and the world is connected through the Wave Road. Meet Subaru Hoshikawa, a fifth-grade student who lost his father in a space accident. Subaru meets an extraterrestrial radio-wave being named War-Rock, descending from a distant FM planet. War-Rock claims to know about Subaru's father, but many alien beings are after War-Rock. The two work together and merge into Rockman, a radio-wave human capable of traversing the Wave Road and battling the radio-wave viruses and FMs that threaten the Earth. (Source: ANN)
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