I mean, its not bad for having probably gone through 3 rounds of google translate, but Jesus Christ if you're gonna snipe a release proof read the thing. This reads like a 4 year olds English test.
I'm thinking the nameless kids from the flashback are Jean, Amanda, and someone else, even if Jean claims it wasn't his journal. Would explain why Jean is so keen on getting in.
@Marrdreg If they do a manga from the beginning, they have to build a reader base and sometimes it's really tedious. On the other hand, sniping popular manga gets you a lot of readers (especially those who don't care about quality), their credit page pretty much explains what you want to know lol