A Sister's All You Need (Japanese: 妹さえいればいい。, Hepburn: Imōto Sae Ireba Ii) is a Japanese light novel series written by Yomi Hirasaka and illustrated by Kantoku. Fourteen volumes were published by Shogakukan under their Gagaga Bunko imprint from March 2015 to February 2020. Two manga adaptations have been published by Shogakukan and Square Enix. A 12-episode anime television series adaptation by Silver Link aired from October to December 2017. Source: Wikipedia (en)