Strong opening and enough intriguing questions raised to hold you to what turns out to be an unsatisfying conclusion. The opening and first few episodes caught my curiosity, but I found myself sticking it out to the end just to find out how it would tie things up. But it didn't tie many important threads up and we don't learn what happened to the characters and in important cases the why behind their actions. I was waiting for a supernatural angle to appear given the physically impossible things occurring, but there isn't any. The makers just walk away from a reasonable finish. That last 'special' episode or epilogue was weird. The idea that a surgeon/doctor would pursue relationships with two or three high school girls was absurd and I suspect as illegal and socially unacceptable in Japan as it would be elsewhere in the world.