All 13 episodes from the first season of the Japanese anime based on the South Korean manhwa written and illustrated by S.I.U. Bam (voice of Taichi Ichikawa) has spent his life living in a cave under a mysterious tower with only his friend Rachel (Saori Hayami) for company. When she enters the tower because she wants to see the stars, he determines to follow her, even if it means his death. The episodes are: ´Ball´, ´3/400´, ´The Correct Door´, ´The Green April´, ´The Crown´s Fate´, ´Position Ѕelection´, ´Lunch and Tag´, ´Khun´s Strategy´, ´The One-Horned Ogre´, ´Beyond the Sadness´, ´Underwater Hunt (Part 1)´, ´Underwater Hunt (Part 2)´ and ´Tower of God´.