Dream☆Jumbo☆Girl

This is a comedy about a diligent girl who aims to enter the top university in Japan to ensure a carefree future. But when her airheaded friend buys a lottery ticket one day and they actually win a hefty 700 million yen prize, she can't focus on her studies any longer. Instead, the two filthy rich girls decide to have the most ridiculously fun life they can.

(Source: Manga Mogura RE)