A short drama featuring Genos, Saitama and Dr. Kuseno immediately after the sea king arc. Genes is feeling low after his defeat and is determined to become the best disciple by following Saitama's training routine at the beach. Nothing seems to go on well to poor Genos of course. One-Shot only.

The story started off from the part where Annie Leonhardt's titan form was defeated by Eren Jager, and she transformed herself into a crystal and refused all forms of interrogation. Humanities are still in danger is the secrets behind the titans remain unsolved. Can the heroes bring the crystal to a safe place and get the witness out? A comedy filled with short individual stories.