Season 1

Umenokisaka Bella comes to the class of Ohno Shiori as a transfer student. The classmates are interested in Bella's looks but she doesn't respond to them at all. Angry with her attitude, they decide to bully her.

The next day, Shiori is shocked to see that Bella, who fell from the rooftop in front of her, is fine. Ayane is forced by Kaoru and Rin to steal in a downtown area at night but Bella appears before her.

Rin hides her secret social media account from everyone, but that doesn't stop her from obsessing over the number of followers her account has. After the numbers drop, she gets desperate to increase them.

Rin manages to recover her number of followers but is outed as the owner of the account. She is shunned but sticks to the account regardless.

Nanami, an idol, is given a lot of affection by her mother. However, she is in love with her manager and wants to retire. She goes to Shiori to help her plan selling the story to a weekly magazine.

Nanami's plans get crushed and she is forced to drop out of school. Shiori is convinced that her classmates were involved in the death of Kozue.

Kaoru is a class leader with excellent grades. Her father, Hideki, is a famous prep school instructor that even appears in commercials. One day, she follows Bella to her home.

Kaoru resolves to live up to her father's expectations of her but falters after finding out they're out of money and can't buy the medicine he depends on. She is introduced to a less than savory way of earning money by Maria but can't go through with it.

Shiori has been forced to her limit after watching Bella destroy Ayane, Rin, Nanami and Kaoru one after the other. She resolves to find out the truth behind Bella's relationship with Kozue.

Maria hears about the true identity of Bella from Shiori. Her attempt to kill Bella fail. Finally, the truth behind why Kozue died comes out. Can Bella fulfill her promise to Kozue?