Angel Beats!

A group of four male anime characters in school uniforms stand together, with one holding a baseball bat, as their names appear in speech bubbles; the scene cuts to a female character with long white hair playing a grand piano in a dimly lit room; the scene then cuts to a group of five female anime characters in school uniforms holding electric guitars, with their names appearing in speech bubbles; the final scene shows a close-up of a hand holding a handgun, silhouetted against a bright window.