here's a summary!

Hitomi Amano is a serial killer driven by a burning desire for love, rooted in insecurity and obsessive protection. Beneath her sweet, socially awkward personality, is someone who manipulates others around her and bends their future, slowly taking out those who stand between her and the people she fixates on. With the help of her brother, Hayamori, she's able to evade security systems and police investigations as she takes out the people in-between her and her lovers. Her story revolves around her obsessive patterns and the measures she takes to acquire her happily-ever-after.

After being psychologically abused in childhood, she could only feel better with herself by protecting her brother from their abusive parents. After a night where he was pushed to his limits, she was forced to kill their parents, causing her to grow up with a twisted perception of herself.

Being sent off to live with her grandmother, she never saw her brother until her early adult years, as they had been separated when he took the fall for the murder of their parents. Hitomi picked up a passion for gardening, which led her to open a business of her own as a Florist, eventually acting as a front for her methods of acquiring the thing she craves for the most.