there is three reason why little mo is sad/frustrated1. He tian confessed2. He tian tell that he will leave3. He tian said to little mo that he will stop bugging him
2 is the correct answer
Another theory- he can't figure out math
there is three reason why little mo is sad/frustrated
1. He tian confessed
2. He tian tell that he will leave
3. He tian said to little mo that he will stop bugging him