A girl explores a dangerous sunken ship through naked, breath-hold diving! Attacked by a nightmare tentacled creature called "Medusa"! The tone is pure B-movie horror. It mercilessly violates and preys upon the desperate, breath-holding girl's naked body. At the edge of pain and pleasure, what did the girl witness? Fully hand-drawn animation, with over 2,500 drawings in total! Runtime: main story about 19 minutes, around 24 minutes including bonus footage— delivering a volume nearly equivalent to a full TV anime episode.