Kawaii Nante Shindemo Iwanai!

Tengoku Yoi, a perfect beauty who excels in both academics and sports, heads to the classroom in anticipation of the start of a brilliant high school life. However, during self-introductions, it's not her cuteness that causes a stir in the room... but the intimidating boy, Onizuka, who declares, "I'm going to be the heroine of this school!" (Source: Shinchosha, translated)