Saikin Kono Sekai wa Watashi dake no Mono ni Narimashita

Saikin Kono Sekai wa Watashi dake no Mono ni Narimashita...... is a manga series that started in 2012 and ended in 2017.

Chapter 1
Miki wakes up in see-through underwear before heading outside to try and find somebody. After failing to find anybody, she changes into lingerie which proceeds to enter her vagina, arousing her. She then remembers her past of having sex during and after parties leading to her masturbating. She proceeds to leave a piece of her lingerie (due to it now being covered in her ejaculation fluids) next to a tree before returning home bottomless. At home she is fully naked and heads to the master bedroom to see what the owner has. She tries on a piece of lingered which covers her body, but leaves her breasts exposed. Afterwards she finds a vibrator which she uses to masturbate. After getting changed, she heads back to her room to take a bath but encounters a man on her way back. She doesn't realise that she isn't wearing any panties until he sees her vagina and proceeds to knock him out. She then realises her actions and sits on him to check his heartbeat and realises that he has an erection, arousing her.