Based on the erotic game by DWARFSOFT. 
 
Toshio is a serious but passionless middle-aged businessman who loves the sex industry. He was laid off from his company due to poor performance, and while walking through a busy downtown area at night, a beautiful girl in a uniform called out to him. With blonde hair, blue eyes and big breasts that are hard to believe for a Japanese woman, she introduced herself as Iris and asked Toshio to teach her how to please a man. Not understanding what was going on, he followed her and found himself in another world. In this other world, Toshio ends up teaching Iris the sexual service techniques he had developed while frequenting the sex industry. 
 
(Source: Parabook, translated) 
 
Note: Includes 3 extra chapters in the digital limited edition.

Based on the erotic game by DWARFSOFT. 
 
Toshio is a 42-year-old single man whose hobby is visiting brothels. A woman who calls herself Iris suddenly appears in front of him and begs Toshio to teach her how to please a man! Toshio, who has an insatiable libido, has no way of refusing the offer, so he uses his skills to give Iris, who has no sexual knowledge whatsoever, a sex education! However, Iris' true identity is that of a princess from another world... Queen Cattleya appears, unable to bear to see the princess have fallen so completely! 
 
(Source: Lune-soft, translated)

Toshio Kaname