In a world where sirens are common, the protagonist is a hybrid of a human father and a mermaid mother. He's always playing the piano under the sea, when a strange siren approaches him…


Killer mermaids, gender swapping, and a devilish little sister with the power to end the world—four more unforgettable short stories that reveal the starting point of Tatsuki Fujimoto, the twisted mastermind behind Chainsaw Man. 
(Source: Viz Media)
 
1. Ningyo Rhapsody (2014) 
2. Me wo Sametara Onnanoko ni Natteita Yamai (2017) 
3. Yogen no Nayuta (2015) 
4. Imouto no Ane (2018)

An anthology series adapting 8 short stories created by manga artist Tatsuki Fujimoto between ages 17 and 26. 
 
1) A Couple Clucking Chickens Were Still Kickin' in the Schoolyard (Dir. Seishirou Nagaya, ZEXCS)
 
2) Sasaki Stopped a Bullet (Dir. Nobukage Kimura, Lapin Track)
 
3) Love is Blind (Dir. Nobuyuki Takeuchi, Lapin Track)
 
4) Shikaku (Dir. Naoya Ando, GRAPH77)
 
5) Mermaid Rhapsody (Dir. Tetsuaki Watanabe, 100Studio)
 
6) Woke-Up-as-a-Girl Syndrome (Dir. Kazuaki Terasawa, Studio Kafka)
 
7) Nayuta of the Prophecy (Dir. Tetsuaki Watanabe, 100Studio)
 
8) Sisters (Dir. Osamu Honma, P.A.WORKS)
 
Note: This anime had a pre-release world premiere at the "Global Stage Hollywood 2025" film festival on October 5, 2025. A general two-week theatrical run in Japan divided into two parts released on the same day October 17, 2025. The anime series later streamed worldwide in Amazon Prime Video on November 8, 2025.

Tags