From Viz:
Back in junior high, Haruna Nagashima was only interested in two things: softball and manga. Now that she's starting high school, Haruna's focus has changed--she wants to snag a boyfriend and have the romance of her dreams!
However, she has one small problem. Since she never paid any attention to fashion or trend in middle school she has no idea how to go about attracting her yet-to-be-found love. But a chance encounter with with Yoh Komiyama provides her with the opportunity she needs. If he coaches her in how to become attractive, surely she can find herself a boyfriend!

By Strawberrie:
Haruna is a natural tomboy who used to play softball. However, she's determined to learn what it takes to be a girl who can attract guys. And the popular Yoh has agreed to coach her...on one condition: she musn't fall in love with him.