The Laughing Salesman - Season 2 Episode 20 Love Across the Glass
Overview: Computer programmer Kouda Kametarou is obsessed by turtles and Moguro offers him a chance to swim with his favorite sea turtle Kamejirou at the local aquarium. Moguro releases Kamejirou but Kouda takes it home against Moguro's instructions, so Moguro turns Kouda into a turtle.