These are short stories. The "prologue" ones were hylarious! The japanese nonsense crazyness at its finest. The other stories (only chapters 1, 3 and 7, because the others are not online) are less funny and are more faithful to reality, they lack the nonsense but seem anyway really peculiar. The art is not always great but I got used to it really quickly. I can't rate the characters of the prologues because, well, those are too weird, but I like the girl and the boy in chapter 7.
Note: I said 1, 3 and 7 because some manga readers call the prologues "chapter 0", but following the index in the synopsis here in anime_planet, the prologues are chapter 1-7, and the chapters I was able to read are 8, 10 and 14)