Complex sentence: Three years after the events of "Digimon Adventure 02", Taichi Yagami is now in high school, downhearted that none of his friends are able to come to his soccer game and feels that they are slowly drifting apart.
Split into simpler sentences: Three years after the events of "Digimon Adventure 02", Taichi Yagami is now in high school. He is downhearted that none of his friends are able to come to his soccer game and feels that they are slowly drifting apart.