Goodbye to My Face

I'm pretty, and she's ugly.

Since middle school, Maimi and her friends have competed for beauty and bullied their less attractive classmates. Even when they reunite at a class reunion as adults, they show no signs of remorse and each appear to be living a happy life. However, they learn that one of their group members, Namiko, has committed suicide...? A thrilling suspense story in which a false friendship leads to a countdown to death!!

(Source: Seisensha, machine translated)

Original Japanese:
cmoa (Chapters, Volumes)