Incest stories are probably no longer strange in the land of Jav, the two Mako sisters are no exception. Her parents died early, so when she got married, her older sister still had to take care of her younger brother who was in high school. Even though she was married, due to her lustful nature and liking for young men, the older sister disregarded their biological relationship to seduce her little brother, hoping to have sex with him. She continuously performed sexy, arousing actions such as playing with a sextoy in front of him.... Although she tried many times to control herself, in the end, seeing her sister's seductive big breasts made him super excited. A young boy's curiosity and curiosity about sex arose. The secret and incestuous story between the two started from here...