La La La At Rock Bottom

Shigeo, an underdog who gets beaten into amnesia, goes through a desperate struggle to remember his own identity with the help of a lone teenager Kasumi who lives with her demented grandfather alone. She finds his talent to sing and invites him to join her managing band as its lead vocal. Although he tries to start his new life, all the memory coming back to his mind is the dark past he wants to erase. Now, singing is the only thing he is left with to deal with the life he has remembered and will be living. Can they find a shred of happiness in life even after he remembers everything?