Kirakira no Kowashikata

Nagito, a woman living in solitude without needing anyone, decides to end her life. On the day she plans to do so, she goes to a handshake event for her favorite idol, Mizushina Fune. At what was supposed to be her final memory, something unexpected happens—and Nagito’s lonely life is turned upside down.

(Source: Kodansha, translated)