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 that.
The manga begins when he takes 88 on a test and is mocked by his friend. When he tries to take his test from his hand the paper flies out the window. From the outside, where his test falls, is a student who holds his test and also plays with Eight by the conscideance of
the notes and his name.
His nickname is the same as Eight's because his name is Hacchi (Eight in Japanese). From then on, over the manga they are talking little, but more and more. [Yes, for 3 years.]
If you are the kind of person who prefers fluffy stories, with perfect, consistent development, and super heartwarming: definitely read this manga.