Itsuka no Main: Kaminari Shounen - Tenta Sanjou!

いつかのメイン 雷かみなり少年しょーねん・天てん太ふと参上さんじょー!

Based on the manga by Mizuho Shuushi, the story shows a realistic portrayal of a Japanese bike gang member trying to live up to social expectations of him being a 'legend'.