The term "anime-sister" refers to a specific type of adult content involving animated characters in the context of sibling relationships. In this case, the word "anime" refers to Japanese animation, which is often characterized by colorful visuals and fantastical storylines. The term "sister" indicates that the characters involved are portrayed as siblings, specifically as female characters who are sisters. These types of videos often involve themes such as incest, sister-sister relationships, or taboo content involving family members. It is important to note that these videos cater to a mature and experienced adult audience familiar with adult animation genres, and may not be suitable for all viewers