Survival - Shounen S no Kirokuサバイバル~少年Sの記録~

Could you survive in the wilderness that has lost all civilization? A huge earthquake occurs while Satoru and his friends are exploring a cave. After somehow making it to the surface, Satoru is shocked by the scene that lays before his eyes. From that day on, the lonely battle for survival begins! Remake of Saito Takao’s Survival from 1976.