Manga by author Kawahara Kazune - Status completed

From Viz: When Haruna Nagashima was in junior high her life consisted of playing softball and reading comics. But now that she's going to high school, Haruna decides to put all of her energy towards getting a boyfriend and having the high school romance of a lifetime. To help in her quest, she enlists cute upperclassman Yoh Komiyama to coach her as she eschews her jock tendencies and turns herself into the kind of girl who can catch a guy. Yoh agrees, with one catch: Haruna had better not fall for him!

From Selene Scans:Hibiki and her friends are approaching their last year in high school, and while they both have many crushes Hibiki sticks with one. In the middle of her junior year she falls in love with one of her teachers and learns that love seems more difficult for adults than for someone her age. After learning that her teacher has feelings for her as well, they start to get more into their relationship.Side story in volume 1: Tomodachi Nante Iwanaide