Just watched episodes 9 and 10 and episode 10 was a really interesting one. Domyoji goes to find Tsukushi at the fishing docks where her family is staying at, but during a moment of chaos Domyoji falls off the edge of a pier and hits his head on a rock on the beach below.
All seems well when he regains his consciousness in hospital but in a bizarre twist of screen writer's horror he forgets who Tsukushi is!
During the episode they all rally to try and get him to remember, but another patient befriends him and seems to be stealing Tsukushi's place when he finally remembers who is missing from his memories but thinks it's this other girl! This sets the scene for our hour long final episode where it's likely Tsukushi and Umi-Chan will fight it out for Domyoji. Bring it on!