First story: This is a somewhat mature story in the sense that it deals with people that are how most people are or are portrayed. She had a boyfriend before the story begins, they party ect. The main character is also pretty mature in a self sufficient way. She doesn't really have any major personalities flaws and can be pretty competent. The situation is pretty strange for how normal the people are, and it's only stranger with some later revelations. I saw most of it coming but the way it was positioned wasn't worst(or maybe it was) but it was stranger.
In that revelation though, I think there was a miss opportunity. fact is sometimes people do something so wrong or deceptive in a way that it creates a rift or an objection that lingers in how you interact with them(sometimes only sporadically coming up). I felt that sort of thing should have happen between her and her mom. Instead it's all just glanced over, basically forgotten and forgiven and not really explored.
The art overall is nice. I don't know whether I prefer this style but it's nice to see a nice big figure, and more space given to characters. I though the design on the girl was attractive with the curly hair.
This doesn't easily fall into a categorization. It isn't a sweet romance and it doesn't have the substance of a mature one shot. It's somewhere in between. Basically if the premise interests you, don't expect it to try to feed whatever it is you expect from other shoujo stories that might do this. And if you like one shots, don't expect it to be a dark, cynical story about how everyone was wrong, persecuted or selfish ect.
Second Story: It's about a girl going through puberty and growing out of her awkward stage. Her friend she hasn't heard of in a while(who goes to a different school) has beaten her out of it, and gotten herself a boyfriend. Her friends boyfriend goes to the same school as she does, and her friend asks her to make sure he doesn't cheat. Her friends possessive nature and the boyfriends passive nature aren't gelling well, and as their relationship struggles the girl finds herself attracted to her friend's boyfriend.
This is a mix of styles, it has some elements like the first but it also has more typical shoujo elements, especially with the heroine. It's less complicated and strange while still being grounded, and the characters being somewhat more normal for adolescents. The characters are younger than the people in the first story, so its more of a first love and growing up story. One complaint is the way the guy self destructs his relationship isn't uncommon but we don't see him ever really regretting it. It is well done and it's easier and shorter than the first. So it's easier to recommend over the first since It's an easier concept to take.