Takahashi Chizuru

Sekitani Ginko is a 19 year-old single mother, fresh out of high school and with a new boyfriend who has just proposed to her. She's pretty, smart, and doing well in her life. She also used to be the leader of a vicious street gang. Can she reconcile the two halves of her life? source: mangaupdates

The story is set in Showa 38 (1963, a year before the Tokyo Olympics) and follows the coming of age of a high school girl named Komatsuzaki. The manga recounts Komatsuzaki's everyday life of "laughter and tears" with a school newspaper member, the student council president, and other schoolmates.