The narrative of Aneki: My Sweet Elder Sister is deceptively simple. The protagonist, let’s call him Takumi (name varies by adaptation), is a high school or college-aged young man who lives with his step-sister, Saki. Saki is the quintessential “aneki” type: confident, nurturing, but with a mischievous and possessive streak.
The “animation” aspect refers to the 2015-2016 OVA (Original Video Animation) production by studios like Pink Pineapple or Mary Jane—though specific studio credits vary. Two or three episodes were produced, each roughly 25-30 minutes long. aneki my sweet elder sister the animation verified