Nawa de nurasu

Toshiko lives with an older man, Shozo. On her back was a tattoo of Hannya carved by Shozo. Her tattoo artist, Shozo, who inherited the blood of her masters, tattooed her in order to keep her in her hands. He is currently traveling to Europe because a foreigner asked him to tattoo him. Asako and Shinji, who live in the room next to Toshiko, are student lovers, but when Asako finds out that she's cheating on her, she goes to her girlfriend's Masao. After hearing about her situation, Toshiko puts Asako to sleep when he comes to retrieve her belongings and tattoos a dragon on her secret spot, but...