Undo

Yukio brings home a couple of turtles to keep Moemi company. He drills a hole in the front of one turtle's shell so that it can be taken for walks on a leash, but Moemi spares the second from the same fate. Their lives seem reasonably happy until she has her braces removed, and Yukio finds kissing her less satisfying. She starts tying up everything in her sight with knotted twine. A psychiatrist diagnoses "Obsessive Knot-Binding Syndrome" due to deficiencies in her relationship with Yukio. (imdb.com)