Ho Goo Hee, excited to start high school, starts off on the wrong foot.

Scorned, Goo Hee enters Jung Woo's name as a target for revenge.

When her family's restaurant is targeted, Goo Hee makes another entry in the Revenge Note app.

Goo Hee and Duk Hee come up with a plan to stop Yi Joong.

Horrified that her brother gave the photo album to Duk Hee, Goo Hee tries to fix her broken friendship.

Frustrated by the way her brother treats her, Goo Hee runs away from home.