I! the Only Man on Earth!

He was trapped in a cave while traveling, and an earthquake and landslide trapped him inside for the rest of his life. In the cave, after getting a bead and learning the Sleeping Immortal Technique, you can sleep without eating or drinking for an unknown amount of time! I don't know how long it took, but after I left the cave, the world was still the same, but the only difference was! There are no more men in this world! All women! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.