Kateinai Renai

Overview

When Satsuki lost her family and was alone in the world, her older boss Yukihiko comforted her and filled the gap in her heart, and she married him to form a new family with his son, Kimiya. However, Yukihiko dies suddenly in a car accident, leaving Satsuki a widow. When Satsuki vows to continue living together with her step-son Kimiya as a "family." Kimiya tells her, "You're the only one who thought we were family," and suddenly attacks her even though it's his father's funeral....... "No! We're supposed to be family.......!" It's a forbidden love with a handsome step-son and a shocking ending— (Source: Bunkasha, translated) Note: Includes one bonus chapter.

Source: AniList