It seems that Terasu mc is adding at least two more parts to this comic. I think next part will see Hiroki peeking on her friends having sex with the guy and he masturbates as he watch them. Then again he may algo get so angry and hurt that just runs away and masturbates at home. Other scenario I imagine Hiroki being caught peeking and the negrto beat him again and continues to have sex with the girls while Hiroki watches helplessly. Maybe a cop catches Hiroki peeking and is taken to the police and her mother has to bail him out, then he masturbates at home. And for the last part, the women on Hiroki's life just drop the pretense of hiding what they are doing and openly have sex with the negrto, a montage of Hiroki finding her mother, sister, friends having sex here and there. The nigg is a exchange student so eventually he goes away, Hiroki thinks his woes are over, but we cut to a few months later and we discover Hiroki is now busy with a new little brother, a little nephew, and her friends bring over their own black babies to visit their half sibblings.