Embark on a literary journey with Big Sister from the 9th Dimensional World, also known as 9次元世界から来たおねえさん in its original Japanese form. The story revolves around Kentarou, a college student entangled in unexpected escapades beyond his imagination. This web novel, encompassing comedy, drama, harem, romance, school life, and slice of life genres, offers a diverse and immersive reading experience. With themes of aliens, cautious protagonists, forced relationships, and human-nonhuman dynamics, the novel introduces a fresh perspective that intrigues and captivates readers seeking an unconventional and compelling narrative.