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Merman in My Tub

From Alfawiki
Adapted from the English Wikipedia article Merman in My Tub, available under CC BY-SA 4.0Updated 10 August 2025
Monthly Comic Gene
Company typeMagazine
IndustryPublishing
Founded2011
Area served
Japan
ParentMedia Factory
is a Japanese four-panel manga created by Itokichi. It was serialized in Monthly Comic Gene, published by Media Factory, from 2011 until 2020, and consists of eight collected tankōbon volumes. An anime adaptation produced by Asahi Production was broadcast from October through December 2014.

Plot

The narrative centers on Tatsumi, a high schooler living independently, who unexpectedly takes in Wakasa, an attractive merman, finding him in his bathtub. The series depicts their everyday experiences and interactions.

Characters

A high school student who encounters Wakasa drying out beside a river and offers him shelter in his bathtub. Initially startled, Tatsumi gradually adjusts to cohabiting with Wakasa and his aquatic companions.
A merman who escaped from a polluted river after rumors about mermaid appearances spread. He now comfortably inhabits Tatsumi’s bathroom.
An octopus merman and longtime companion of Wakasa who enjoys squeezing into confined spaces such as Tatsumi’s washing machine.
Tatsumi’s younger sister, protective of her brother and suspicious of Wakasa as a potential rival for his attention.
A jellyfish merman capable of dividing into smaller versions and delivering electric shocks. He has a laid-back demeanor and frequently travels.
A sea snail merman rescued by Tatsumi from bullying. Typically self-critical, he becomes cheerful when treated kindly.
A large shark merman believed to have inspired the movie Jaws. Despite his fearsome looks, he is shy and mainly communicates through gestures.
A starfish merman younger than Wakasa, who enjoys children and possesses a sticky body.
Tatsumi’s classmate and friend, unaware of Wakasa’s presence at Tatsumi’s residence.
A rubber duck located in Tatsumi’s bathroom that functions as the anime’s narrator.

Manga

The chapters were collected into eight tankōbon volumes released by Kadokawa Shoten. The series concluded with the publication of the eighth volume.

Anime

The anime television adaptation, produced by Asahi Production, aired from October 6 to December 29, 2014. Direction was handled by Sayo Aoi with scripts written by Yuniko Ayana and character designs created by Koji Haneda. Crunchyroll streamed the show in North America and selected regions, while Medialink secured licensing rights for Asia-Pacific. The opening theme song "Chimeishō" (致命傷, meaning Fatal Wound) is performed by Matenrou Opera.

Episode list

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No. Title Original air date


Television drama

The live-action drama 49 Days With a Merman, consisting of 14 episodes, debuted on February 6, 2022, on KKTV Taiwan. This production represented MediaLink's initial venture into independently producing a drama series. Under the direction of Hsi-ming Chang, the cast includes Bruce Hung, Kent Tsai, and Liu Chu-Ping.