Who Were the People in My Previous Life?

The world changes dramatically, spiritual energy revives, and many worlds are intertwined. The new exchange student seems to have a physique that attracts ghosts. Although he is a stranger, he said to him when they met for the second time, "Long time no see". The new beautiful teacher insists that she is his sister in this life. Everyone in the mysterious Taoist Alliance of Cultivation Force calls him "Senior". However, not before the mysterious heavy rain arrived. He is just an ordinary student.