Details
Episodes
1. Muromi-san on the Brink
Takuro Mukojima is outside fishing when he reels up a girl who introduces herself as Muromi-san, a mermaid.
2. Muromi-san and the Legendary Sea Creatures
Muromi-san gives Takuro her cellphone number and is upset when he doesn't send any messages despite her sending him hundreds. Later, Takuro fishes up another mermaid who introduces herself as Levia-san (Leviathan), a giant sea monster from the Old Testament.
3. Muromi-san and Old Memories
Levia-san, Hii-chan, and Sumida-san try to get Muromi-san to get over her hatred of marine mammals. She hates them because she had a boyfriend in the Mesozoic era who had developed lungs, but decided to stay in the ocean anyway. She thinks whales and dolphins are his descendants. Levia-san tells Muromi-san that that toothed whales returned to sea after having evolved into complete land mammals, which means her ex-boyfriend either evolved into something else or became extinct.
4. Muromi-san and the Food Chain
Takkun meets another one of Muromi's unique friends, later the trend continues much to the chagrin of Muromi.
5. Muromi-san and Twin Mountain
Fuji use to admire Muromi and her gorgeous tail, but the current status of Muromi tail only brings anger.
6. Muromi-san and Ryuuguujou
After catching an unemployed fish, Muromi tells Takkun about the Ryuuguujou and the evil Otohime.
7. The Boy, Kappa, and Muromi-san
While river fishing, Taku can’t escape the salt water Muromi or her legendary friends.
8. Muromi-san and the Nice(?) Type
Trapped by a gang of deadly sea animals, Muromi has only one chance of survival.
9. Muromi-san and the Secret Advanced Civilization
Youthful pride of Curiosity, how far will Taku go to learn more about the ancient civilizations that tried to defy the gods?
10. Muromi-san Worldwide
Ciel gets the chance to meet a unique cast of characters and later Yeti has to call on Takku for help.
11. Muromi-san and the Chill
Takku runs into Otohime selling popsicles, later he runs into Levia-san at a convenience store where an unexpected party breaks out.
12. Muromi-san and Different Forms of Love
Fuji turns to the one person who might help her convince Muromi to regrow her tail fins.
13. The Years Go by Muromi-san
Muromi is preparing a new years joke while Tak-kun is worried about his future. Muromi gives him some advice and in return, Tak-kun presents her with a present. Muromi then goes to enjoy the hot springs and watch the first sun rise of the new year with everyone.