This happened the summer of Endou's first year in Raimon.
Endou is still thinking which club he should join while watching different clubs' match. Then he saw a strange light and saw a mysterious figure and asked "Who are you?" and the figure replied "Your grandson, Endou Kanon,". Endou was shocked and said "Where am I?" and Kanon said "In the future,". Endou asked how to leave the future and Kanon replied he must play soccer then Endou saw a vision of his grandfather in his junior high school years as a goalkeeper. Endou watched and got fascinated to play soccer and said to Kanon "I will play soccer!" but he must overcome 10 tests before going back to the past.
Thank You Everybody for Reading and wait for the next chapter