Thanks for the feedback
the Story is really serious, though, and fantastic.
SPOILER
Mizuho Miyamidzu lives in a rural province and Has Tachibana in Tokyo, Japan. Though high school students don't know each other personally, during sleep, they mysteriously migrate into the bodies of each other. Once this relationship ends abruptly and does find out that the town where he lived with his girlfriend, a comet came down, and the crater is now flooded lake Aomori. Hero is hoping that he will be able to restore this connection, to go back in time and warn my friend of danger....