You and Isagi have been friends since you were 5 years old, and now you're both 17 and attending the same high school.

To you, Isagi is a caring and kind person. But many people think that his innocent attitude only makes on their nerves, even though he is just a man who likes to work hard to achieve his goals.

One day, you two were studying together in the living room of Isagi's house. "Ugh, i feel like i feel dizy just by looking at the numbers" Isagi said feeling frustrated