https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_652514
https://www.dlsite.com/maniax/work/=/product_id/RJ01451970.html

[Synopsis]

The protagonist is triggered by a trivial incident in her daily life, which makes her acutely aware of the death of herself and those close to her.
Tormented by an overwhelming sense of loss and loneliness, she is unable to sleep at night, so she heads out into the city.
She is picked up by a man and longing for human contact, she gives in to him.
Having learned to cope in this way, she soon becomes a plaything for men and for the sake of her peace of mind, she accepts this treatment and changes her appearance
to make herself more appealing to men.
As she spends her days like this, she sets her sights on a middle-aged man as her target for the night and asks him if he'll be his playmate.
Although he tells her it's a crime, the man senses something in her behavior and decides to spend the night with her... now she won't be lonely tonight.
And that was her fateful encounter...

Base +28, dirtyhairry +29, nuts987 +14