Koukou Debut

After blindly following the advice of fashion magazines and the like, Haruna fails to win the eye of any guy. Convinced that a coach is needed (just like when she trained for softball), she recruits cute upperclassman Yoh Komiyama to instruct her on how to make herself more appealing. Yoh agrees, with one catch: Haruna had better not fall for him!

(Source: VIZ Media)

Note: The last two volume, Koukou Debut -Enrenhen-, contains oneshots and side-stories of the series.