Yuna Mashiro and Haruki Sato star together in this dream collaboration. The sexy Haruki sister takes her innocent sister Mashiro step by step in lesbian play! She teaches her a lot of naughty things. The nosy Haruki even gets Mashiro's boyfriend involved in some sex instruction! The sisters cooperate with each other with a double blowjob and a double titty fuck! At the end, the excited sister joins in for a threesome! The big-breasted sisters are going crazy!