Xiang Yang’s transfer came as a complete surprise.

Song Zhehan remembered it very clearly—it was an ordinary Sunday in May.

The day before, Xiang Yang had agreed to go out and walk the dog with Song Zhehan, but when Zhehan arrived at Xiang Yang’s house with the dog the next day, no one answered the door, no matter how much he knocked.

Xiang Yang’s father’s house was a large villa, and after they became friends, Xiang Yang would invite Zhehan over every now and then to hang out.

Song Zhehan was so familiar with the route that even his dog …