As in the synopsis he says, with his relation to Hacchi he begins to "instill" changes in Eight. Yup, the story is very slow. It happens over 3 years.
The main character has been nicknamed "Eight" since childhood because of his name, he suffered bullying so he always hated being called like that.
The manga begins when he takes 88 on a exam and his friends makes fun of him. When Eight tries to take his exam from his friend's hand the paper flies through the window.
At the courtyard where his test falls, there is a student who holds his exam and also make fun of
Eight because of that conscideance.
His nickname is the same as Eight's because his name is Hacchi (Eight in Japanese). And from then on, their relationship begins. [For long 3 years.]
If you are the kind of person who rather fluffy stories, with perfect, consistent development, and super heartwarming: definitely read this manga.