Inside a women’s prison, a beauty salon operates where inmates cut the hair of ordinary customers from the outside. The sole hairdresser is Haru Komatsubara, an inmate serving a long sentence for a serious crime who earned her professional license while incarcerated. The salon itself is an unusual space: the ceiling and walls are painted to resemble an endless blue sky, a deliberate contrast to the confinement of prison. Haru works quietly and attentively, listening to her clients as she cuts their hair. The customers come with their own burdens—heartbreak, illness, regret—and the calm, unhurried time spent in the salon often leaves them lighter in spirit.

The story unfolds through a series of interconnected vignettes. In the first, magazine writer Shiho Ashihara visits to research an article. Nursing a recent breakup and feeling lost in her career, she finds herself unexpectedly moved by Haru’s gentle presence and one brief exchange. Later chapters introduce other clients: a high school girl about to lose her hair to chemotherapy, a woman struggling with a difficult family situation, and eventually Haru’s own elder sister, Natsu, who comes to the salon for the first time since Haru’s incarceration. Through these encounters, Haru’s own past is gradually revealed—the crime she committed, her relationship with her family, and the quiet guilt she carries. She continually asks herself whether finishing her sentence will truly mean she has atoned.

The manga explores the theme of rebirth through small, human moments. Each haircut becomes a kind of ritual, a shedding of the old self and a tentative step forward. The blue sky painted on the walls serves as a symbol of both the freedom the inmates long for and the immutable, ever-present possibility of change. Told with delicate art and understated dialogue, the story gently limns the lives of women on both sides of the wall—those serving time and those navigating the challenges of ordinary life—and the unexpected connections that form in a place where few would think to look for grace.