Swap bodies

Xu Xinduo and Tong Yan has swapped bodies since they were 7 years old. Initially, the swapping was uncontrollable. These swaps lasted anywhere from a few minutes to a few days. As time went on, they found they could swap whenever they wanted as long as they swapped at most four times in 24 hours. Swapping once then returning counts as two swaps. At 17, forced swaps are rare, but still occur. While swapping bodies, Xu Xinduo tries to talk less and Tong Yan tries to be less angry, but they still have different auras.