The male protagonist and the second male protagonist were born as children, but the male protagonist had to go abroad with his mother when he was in elementary school, and did not say goodbye to the second male protagonist. Since he had no contact information when he was still young, there was no further contact. Why is it called that tree? Because they made a promise under that tree when they were in primary school, saying that they would definitely come here to make their promise when they grew up. But now I don't know if the male protagonist remembers...
Intention: Yuan Dan