"10 Years of Sucking on My Little Sister's Breasts" is a 180-minute long special with the first double cast in the series! A strange story of 10 years of sucking on the beautiful big breasts of two sisters with completely opposite personalities, from their school days until adulthood. The reliable and down-to-earth eldest sister (J cup) and the cheerful and playful second sister (G cup) sympathize with their younger brother who is no good at anything and shower him with maternal love...