Gakkou No Ojikan

From Temptatious Taboo:
Normal high school student Riku comes back home one day to find… she is now the school chairman of a famous elite school?! It seems her grandfather left her the post after his death and, although Riku is not really enthusiastic about the idea, there happen to be two really interesting guys that attend that same school who helps her a lot in the school. But sometimes she helps them…
Also contains a side story called Kimi no Te to Hitomi to (Your Hands, Your Eyes) in volume 5.