A: The original Aneki: My Sweet Elder Sister VN is available on DLsite (English patch available). It has more routes and endings than the anime.
A: Yes, a one-shot manga adapted by Nerikeshi was serialized in Comic ExE (2018), but it is out of print. aneki my sweet elder sister the animation upd
The story focuses on the affectionate, slightly teasing, and deeply romantic relationship between the protagonist and his “aneki” (a casual, affectionate term for “older sister” in Japanese slang, similar to “big sis”). The original game was praised for its warm, “gap moe” character dynamics (tough exterior but sweet interior) and high-quality CGs. Following the success of the visual novel, an adult anime adaptation was produced by studio T-Rex (known for other eroge adaptations). The OVA (Original Video Animation) was released on DVD and later on digital platforms. A: The original Aneki: My Sweet Elder Sister