succubus stayed life
Succubus Stayed Life ("Life with a succubus") is an erotic doujin manga by Sasamori Tomoe. The male protagonist meets the self-proclaimed "succubus", Sakuramachi Touko, and they eventually get into a sex friend relationship. But soon, both the protagonists childhood friend, Yomisawa Tsukino, as well as Touko's "succubus" friend, Akizono Kanna, appears...
Adapted into an adult light novel, written by Honjou Yagi (external link), in 2017.