Shoujo Shihai(2018)

Shoujo Shihai

"Tonight, we're going to kill Mifuyu's father."

To save their best friend from domestic violence, Nao Nanba and two of her classmates plan the murder of Mifuyu's abusive father. They thought they had pulled off the perfect crime and finally put an end to their best friend's hellish days, until... When "secrets" between girls are revealed, good, bad, and ugly, their beautiful friendship quietly crumbles.

(Source: Kodansha, translated)