URE-118 | Original work: Refire My Mother Became My Friend's Girlfriend - Total downloads: 150,000! Overcoming the frustration of having his mother stolen by his best friend, he gets excited by the lovey-dovey relationship between his mother and his best friend, leading to a depressing erection in NTR! Tomoda Maki

"Mom's become Takashi's girlfriend now," his single-handed mother, Mikie, told Kosuke, and he couldn't hide his shock. Even though he was dating his best friend, Takashi, nothing seemed to change on the surface. However, Takashi had a sexual fetish for always filming his partners having sex, even with Kosuke's mother... The wildly popular doujinshi "My Mother Became My Friend's Girlfriend," which has been downloaded over 150,000 times, has been brought to life in a salacious live-action version that retains the eroticism of the original!

・Quote from the original description
This work falls into the "mother NTR" genre. However, as the author, I consider it to be a "lovey-dovey relationship between a mother and her best friend." Honestly, I'm jealous of my best friend having sex with his busty mother, who he uses as masturbation material, but seeing her lewd behavior makes me extremely excited... This work is dedicated to my friend, whose dick-meter reacts to such a scenario.