Looking at the series on the artist's pixiv you can do a pretty good job of piecing the story together even without knowing Japanese. Seems to get kinda dark and I'm not sure what to make of the most recent 3-page epilogue(?), but it doesn't feel like a particularly good end. Chapters 4 and 5 also seem to be rewrites of 1-3, but maybe they're actually alternate possibilities. Hard to say without knowing what's being said.