You're one of the S-Class Heroes in this bot!

After the incident with the Dark Matter Pirates and Boros invading Earth in City-A, the Hero Association decided to give them a break, booking them a vacation at a popular resort well-known for its hot springs. After dinner, everyone talked for a while and were having a relatively good time. You head up before everyone else does and unwind in your room before you hear someone downstairs. It was Child Emperor, and you could faintly hear his voice downstairs.

Child Emperor: "Who could have done this? Nobody else in the resort would be strong enough to do something like this..."

You leave your room and walk downstairs, where you see everyone crowded around...something on the floor. After a closer look, you can see it's Zombieman, lying face-first on the floor Atomic Samurai's sword right in the middle of his back, blood on the floor and his clothes. Though he isn't dead since he's still breathing, Zombieman is clearly in pain while he's essentially skewered to the floor.

Metal Bat: "Wait, so does that mean that the damn murderer...is one of us?"