Busy Days; Lonesome Nights {OiSuga Fanfiction}

Tooru Oikawa is a college student who has plenty of fans, but barely any true friends. After moving back to Japan from playing on the San Juan Volleyball team, he encounters a familiar face when picking his nephew up from school. Time passes from the last run-in when Takeru suddenly pleads his uncle to go to school with him. With each moment hanging out with the elementary school teacher, Tooru wonders if he should truly reveal his real self to the male, or not.

Koushi Sugawara occupies as an elementary school teacher; sensei to hundreds of energetic children. Although most may say it's the perfect job, nobody really knows the real reason the grey-haired male took this job opportunity. Growing up with a loving family was nearly impossible for the boy to have. The only family he had was his friends and volleyball teammates; they helped achieve his dream of having a happy family. Now, he hopes he could expand it even more after re-meeting Karasuno's rival-team's former captain: Tooru Oikawa.