https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_598293/

[Synopsis]

Two sisters, Setoka and Momoka, are visiting the beach in the summer.
What was supposed to be a fun trip ends up being attacked by two mysterious black men!
On a quiet private beach, their cries for help go unheard but the two are seduced by the unusually strong bodies and brutally huge cocks of the two men, who are unlike anything Japanese men...

Chinese translation: https://e-hentai.org/g/3466367/b0c0df90dd/

Base +28, nuts987 +14, xlovehebe -6, Fofotron +26