Big Sister from the 9th Dimensional World, originally written in Japanese as 9次元世界から来たおねえさん, follows the story of Kentarou, an awkward college student who finds himself entangled in unexpected predicaments. This web novel delves into themes of comedy, drama, harem, romance, school life, and slice of life, offering a blend of genres to captivate readers. With elements of aliens, cautious protagonist, forced relationships, and human-nonhuman dynamics, the novel presents a unique narrative that goes beyond the ordinary, promising an engaging and intriguing read for those who appreciate a touch of the extraordinary.