Jun might be a brat but he cares for the doll and it shows when he tried to face his trauma. Also, his trauma about going to school seems so deep because he keeps being haunted by it. The only thing I find weird in this episode is that Jun and Tomoe were in the second floor because the library is located there but when Tomoe let Jun escape through the window, it shows that they are in the first floor. The inconsistency and error is very obvious.