ERKR-1034 The flat-chested younger sister steals her sister’s boyfriend while the busty older sister is sleeping beside them

Miki, the younger sister, always wants whatever her older sister has, even if it is her boyfriend. One day, before her sister came home, the boyfriend was visiting the house. When the sister returned, Miki kept finding chances to flirt with him and get close to him. Then, while her sister was sleeping nearby, she took her sister’s boyfriend away. After that, they became intimate in different ways and had a secret affair in another place.