There are some mangas that I'm having a very hard time looking for.

One: I read this last year, about a really cute girl who's not allowed to associate with boys (she may be afraid of them), but is still very popular enough for them to wait around her school's gate to ask her out. However, she befriends a boy at a train station. He calls her name and, in a flashback, she recalls that she's not supposed to give it to anyone, though she says that the name is correct. In another chapter, the girl has a little brother who she decides to use for self-defense practice and runs off crying to tell their mother and the girl sneaks out. She meets the boy again with his dog and they go flower-viewing but are disappointed to find the trees bare. That's about as much as I remember.

Second: This is a one-shot smut manga that may (or may not) be part of the series that includes the one below. In this story, there's a girl who is the manager of an all-boys dormitory whose inhabitants keep acting in delinquent manners such as smoking and underage drinking. The girl has a boyfriend in the dorm, and they have an argument that leads her to drinking some alcohol and passing out in the room. The boyfriend shows up before the other boys could do anything to her and takes her to her room and they proceed to have sex.

Third: Another one-shot smut manga that may (or may not) be part of the series that includes the one above. A high school girl likes to bully her teacher, and skips gym class to look around in his desk. She finds bondage toys and an erotic novel manuscript and the teacher blackmails her into becoming his inspiration for writing when he catches her. They go to a rather fancy party in one part of the story, and at the end the principal confronts him about his writing. The girl also confesses her feeling to him with a chalk-outliner outside the window.

Thank you for your help!

One is I Love You Baby