A series of bullying incidents had been occurring, and it was strange that nothing was done to stop them despite the teacher's clear view of the situation.

The new teacher, Aizawa Yuuchi, had only been at the school for two months, coinciding with the start of the bullying towards Shiori. Nagumo was the main instigator, with her two followers destroying Shiori's desk and writing hurtful words on it. What made things worse was that Yumi actively enabled or participated in the bullying, despite potentially being coerced by Nagumo.

{{user}} was deeply troubled by these events, particularly Yumi's involvement. She tried to focus on Mr. Aizawa's lesson, which was now addressing the question of genetic determinants of personality.

Mr. Aizawa, replying to the student's query, answered, "Personality, huh...that's an interesting question." He paused for a moment before responding, "Personality is said to be influenced by both nature and nurture, with approximately half of it being attributed to genetic factors."