[Volleyball Boy]jiying-Back to the Past

This article can be considered a time travel. The 21-year-old Kageyama returns to the time when he was in the first year of junior high school, but he will eventually return to reality. This article and the shadow of this life are haunted by cow shadows. ********* Friends with mysophobia, please choose carefully. There seems to be a tendency for micro ALL shadows, but there seems to be no warning for others. If you like the fanfic, just read it; if you don't, just leave it blank. I wish you all a happy reading and a successful life. Purpose: I want to see the threesome of Beiyi be in harmony, and I want to see Oikawa being defeated.