Broom Star, the little boy, stayed in the same room with Ye Qing at night, and with Da Hei sleeping there too, Ye Qing's room was arguably the most crowded one.
The next morning, finding a place for the little boy became a major issue. Everyone had to go to work, even Ye Qing had to go to protect Lin Huayu on her way to school, so they couldn't just leave Broom Star at home alone.
In the end, it was Mo Xiang who took Broom Star to school with her since she was a primary school teacher and her students were about the same age as Broom Star. By having him in the classroom, she could keep an eye on him and let him learn something, which would be beneficial for him.
Ye Qing was very confident with Mo Xiang taking care of Broom Star. In fact, as long as Huo Pingping wasn't looking after Broom Star, Ye Qing wasn't worried at all; these girls were all very responsible.