Kimi to Barairo no Hibi

Before you know it, they bloom and the world becomes full. Nobara Mochizuki is a second-year high school student who has yet to experience her first love. She is often described as "serious" by those around her, but one day, her teacher asks her to help a student with extra lessons. However, the person she is giving extra lessons to is Setohara, a famous guy who is also the subject of many bad rumors around the school.

(Source: MANGA MILLION)