Himitsu de Scandal

From Toothpaste Scanlations:
Maria is #1 in every guy's heart and lots of guys want her to be their girlfriend. Even though she is very popular, she actually got dumped by her fellow idol Katsumi. Although wanting a simple love life, she is constantly being watched as an idol, and everyday Maria is chased by crazy fans. It was under these circumstances that she met a boy. Not only did he steal Maria's first kiss, he also doesn't seem to know that Maria is a super famous starlet!?