Watch Ane Jiyoku Tsukushi: Nee-san no Shitagi – Episode 1 English Subtitles

Mizuki is an ordinary high school student living with two exceptional older sisters: Ema, the perfect student council president, and Ryuka, a popular idol-like beauty. For years, Mizuki has been teased incessantly by the sharp-tongued Ema and treated poorly by Ryuka. However, their dynamic shifts drastically when the sisters discover that Mizuki has finally gotten a girlfriend.

Unable to tolerate the thought of another girl claiming what they view as theirs, their frustration quickly turns into intense possessiveness. Taking the lead, Ema makes the first bold move to reassert control over her younger brother.