Muromi-san and Old Memories
Show: Muromi-san --> Season: 1 - Season 1
AirDate: 4/20/2013
Runtime: 13
Voting: 0 (0)

Overview: 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.