Sora Hoshino originates from the manga series *Yakyū no Hoshi: Metman*, confirmed through his inclusion in the anime *40-Shūnen da yo! Coro Coro All-Star Shōgakkō*. This special anime unites characters from various Coro Coro Comics publications as classmates in an elementary school. He appears alongside figures like Beyblade Burst's Valt Aoi, Yo-kai Watch's Jibanyan, and Duel Masters' Joe Kirifuda, forming part of an ensemble cast commemorating Coro Coro Comics' 40th anniversary.