Kono Yo wa Tatakau Kachi ga Aru

Kiri Itou, third year in a company. She gets by on stacks of energy drinks, dealing with a bad job, a sexually harassing workplace, and a morally harassing boyfriend. In the midst of her daily life, she is trying to survive with only one thing in mind: "I want to be useful to other people"... until a letter arrived in her mail. In it was a card. It was her right to live freely. At the age of 25, the end of a life of dedication. And the biggest and last revenge of her life begins! (Source: Shogakukan, translated)