Rinne Miki is a popular and fashionable first-year high school girl. But she has never been in a romantic relationship, even though her outgoing personality lets her make friends easily with the opposite sex. During the high school cultural festival, she meets Touma, a boy with a mysterious air… Rinne is flustered by the aggressive moves from the younger boy, but she also can't stop thinking about Touma…?

(Source: MangaCross, translated)
https://www.cmoa.jp/title/280814/