Unusual things have been happening in Moominvalley. Moomin, Sniff and Mee leave for the Observatory on the Lonely Mountains to confirm the Muskrat's words: a comet is about to hit Moominvalley and destroy everything. On the way they meet Snufkin, the Hemulen and the Snorks and experience many adventures. (Source: ANN)

Melos is a good boy from Messina and has come to Syracuse, the magnificent city of temples, to buy a ritual sword for his sister's marriage ceremony. He meets a very talented sculptor and they become friends. Later, the King's guards arrest Melos while he was having a walk in the castle's gardens and Syracuse's King, obsessed by the idea of assassins out to kill him, sentences him to death. Melos is desperate, but most of all he wants to be present at his sister's marriage, so he asks the King for three days to go to Messina for the celebration and then return to Syracuse where he will accept the death penalty. The King does not trust Melos, but, trying to demonstrate that nobody could trust him, asks him to find a volunteer substitute in case he breaks his promise. The sculptor accepts to be Melos' substitute in this case... (Source: ANN)

Ruka and Rumi Kobayakawa are twin sisters in love with the same man, athletic upperclassman Katsuyuki Touma. Rumi seems supportive of Ruka's fledgling romance with Katsuyuki, until the twins are infected with a strange bacterium that transforms Rumi's personality and gifts the twins with terrifying psychic powers. Now Rumi will stop at nothing - or no one, that gets between her and Katsuyuki, including her own twin sister... (Source: ANN)

Shou and his friend, Tetsurou, stumble upon a strange orb-like mechanism, the Guyver Unit, in the woods. It physically bonds with Shou and turns him into the alien soldier, Guyver. His mission is to protect the Guyver Unit from the Japanese corporation known as Chronos. They are after it and two other units just like it. To retrieve the object, they send out vicious monsters known as Zoanoids. So no one is safe in Shou's life; not even himself.