Don't read this if you're sensitive!!! Sasha-chan works with promiscuity and the heroine's sexual freedom as motivation and learning for the MC, who is a hentai artist, while at the same time developing a romance between the two. There is no netorare (betrayal) here, the two are not dating, and Fuji-kun (MC) knows very well what he is getting into and who Sasha really is. He continues because he likes/doesn't care about her promiscuity. At most, there is netorase (sharing), since Fuji often wants to see his partner in sexual situations with others. Other than that, the manga is really funny and has scenes that make youcringe, while also opening your eyes to what this industry is like in Japan. There's even time left over for some criticism of Japanese society in general. The art is fantastic and can captivate you just with Sasha's beauty. I highly recommend it!