In the context of Yandere media, "Heaven" is subjective. You need to decide what ending you are aiming for before you start.

In the vast landscape of anime, manga, and game tropes, the —a character archetype defined by their explosive blend of fierce love and violent possessiveness—usually lives in a specific narrative space: a psychological thriller or a horror-tinged romance.

Most games offer different "routes" based on which character you pursue.