Class of Cheaters

Aoi reunites with her first love, Iori, after transferring to Class 3C at an elite high school. Soon, an illicit love affair begins.

Iori asks Aoi to go on a date to celebrate her 18th birthday. However, Kotone shows up, tells Iori that she is pregnant with his child, and wants him to sign the marriage registration with Aoi as a witness.

Aoi tries to give up her feelings for Iori after he marries Kotone. However, Aoi and Iori are forced spend time alone together when their homeroom teacher disciplines them by making them clean the gym after school.

Aoi goes on a date with Kanata in an effort to get over Iori. However, she then receives a phone call telling her that her mother has collapsed.

After Aoi and Iori kiss, Iori brings up the topic of divorce to Kotone, who gets very upset and storms into Aoi's house. Meanwhile, Haruka recovers in the hospital and has a meaningful conversation with Yutaka.

Kotone announces her marriage to Iori, causing a fuss at school. Iori's mother, Kyoko, tries to persuade Kotone to give up on the marriage, but Kotone threatens her. Meanwhile, Iori visits Aoi's house, and Yutaka visits Haruka's hospital room.