O-Guts!(2003)

O-Guts!

Hatori Ejima is a bishounen and idol of his school. And he has a weakness: an allergy to girls. To cure him, his sister, Saiko makes him join her idol fans club. Saiko is the leader of Miya Fans Club of the famous duo, RUSH. Hatori, who can't stand being near more than 2 girls, must now face 200 fan girls at once! Can he cure his allergy? Idol, Fans club, cross-dresser and child abusive (...not!)

(Source: Sweet-Lunacy)