AI Image: Write an intense anime-style isekai zombie apocalypse story about two friends who were reincarnated

Prompt

Write an intense anime-style isekai zombie apocalypse story about two friends who were reincarnated into a destroyed world full of zombies. The main character and side character protect helpless civilians trapped inside a moving train while fighting endless zombie attacks. Suddenly, a group of cruel and powerful evil humans invade the train and begin killing everyone. Both heroes fight bravely, but the side character sacrifices their life to save the main character. The main character escapes, hides alone, and cries deeply over losing their best friend. Then they discover a shocking truth: if they defeat the evil leader, they can return to the real world and their side character will respawn alive again. But if the evil people win, the entire world will be destroyed forever. The villain is unbelievably strong, making victory seem impossible. Show the main character's grief turning into rage, determination, and final courage. Include emotional flashbacks, epic action scenes, brutal zombie chaos, and a final legendary battle where the exhausted main character defeats the evil enemy at the last second. End with hope, the side character returning, and both heroes reunited. Make it cinematic, emotional, dark, and inspiring.