Ji Lang and Xia Tian were originally from different worlds, but when Ji Lang was still Ji Lang Lang, he domineeringly pulled Xia Tian into his world, never asking whether Xia Tian was happy or not.
Similarly, when he left Xia Tian's world with a smile, but left long memories of Ji Langlang and Xia Tian to Xia Tian, he did not ask Xia Tian whether he was happy or not.
So Xia Tian said that Ji Langlang was a selfish person.
Conception: