![](https://image.tmdb.org/t/p/original/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![](https://image.tmdb.org/t/p/w342/oqRP005iL9tfyHyoNCWPSgVFQHE.jpg)
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.
![](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
Other episodes for this season
![Muromi-san on the Brink](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and the Legendary Sea Creatures](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and Old Memories](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and the Food Chain](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and Twin Mountains](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and Ryuuguujou](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![The Boy, Kappa and Muromi-san](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and the Nice(?) Type](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and the Secret Advanced Civilization](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san Worldwide](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and the Heatwave](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![Muromi-san and Different Forms of Love](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)
![The Years go by Muromi-san](https://image.tmdb.org/t/p/w300/iWW7A17Js672Df0ZUCIg7KtFCqH.jpg)