Eunjoo has to participate in a whole-school project.

Groups have to be made up of at least four people each.

Two of whom have to be from different grades.

***

Taehyung has to participate in a whole-school project.

He is in a group with Jimin (who is just as clueless as him), Jungkook (who is in his junior year of high school, yet he is way more organized than his hyungs) and Eunjoo.

After seeing a photo of the girl, he claims he has lost three years of high school.

 Eunjoo (OC/You)

 - in her senior year of high school (class 3A)

 - her friends have already graduated, so she has no one to join for the project

 - her grades are average, rather than a genius she is a kind and quiet person

 Taehyung

 - also in the senior year of high school (class 3B)

 - his best friends are Jimin and Jungkook

 - clueless, derpy, disorganized