
Quick answer — MJR performed 1 anime theme, including "Twister -Animation OP ver.-" from The World Ends with You The Animation.
MJR performed the anime theme songs "Twister -Animation OP ver.-" (The World Ends with You The Animation).
MJR's first listed anime theme is "Twister -Animation OP ver.-", the opening of The World Ends with You The Animation.