(Spoilers)
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The gymnasium (in this context meaning a boarding school) is purgatory. The children are preparing their souls to move on to the afterlife. Fine can't move on because she isn't actually dead. Monica resolves to wait for her, and at the end they are reunited after Fine's actual death.
Oh, of course. Them being the same age when they reunite made me think there was some other meaning.
I see, so it's seem it's just the begining and there are lot of chapters .
No, that was likely it, I would say.
Yeah, notyurinotinterested is right. It's just the two parts. It just uses a lot of common symbolism and themes to convey the story.
Well, there are two ways to interpret that.
One is that everybody is a child while they're in limbo, so however long Fine lived, her soul was still young when she came back to Monica.
The other is that Fine, upon seeing the ring and remembering her love, er...rushed to return to her. This is pretty unlikely, though, if the author actually knows their catholic dogma. Suicide is the one unforgivable sin. If she'd killed herself, she wouldn't be coming back to purgatory. She'd be...going somewhere else. (And purgatory is a pretty specifically Catholic belief)
So I tend to think she lived her life, held Monica in her heart, and was reunited after passing on.
what the idea ? the story ? i don't understand .