My Little Sister Was Dissatisfied With Her Boyfriend's Teeny Tiny Dick, So Now She's Locked Onto My Big Cock Which She Just Happened To Catch Sight Of!? She Finally Could No Longer Resist, So One Night, She Climbed Into My Futon, And Then...

Original title: 彼氏の極小チ○ポに欲求不満な妹は、偶然見た僕のデカチンに釘付け！？ついに我慢できなくなったのか夜中僕の布団に潜り込んできて…

Beautiful girls who are frustrated because their boyfriend's cock is too small, accidentally witnessed their brother's big cock and mako reacts with a startle! My younger sister, who is itching to be thrust into a big cock, decides to go on a reverse night.