It's a doomsday setting, and the male protagonist is a yandere pervert who lives next door to the female protagonist. I have been eyeing the heroine for a long time.
The heroine knew she was being watched. But he had no choice but to defect to the male protagonist. In fact, I always thought about running away. Of course... He didn't make it.
Intention: In the end of the world, there is still love.