Tomodachi Gokko

Midori moves from Tokyo to start her senior year of high school in Sendai. She saved her childhood friend Aa-chan from teasing, but the class boss, Erena, stirs up a revolt and makes her the new target. Midori can't bear the never-ending torment and personally takes her own life. Midori gets a second chance at life, choices and revenge though. This is Momochi Reiko's first challenge at a time warp story!

(Source: Forbidden Garden Scans)