お姉ちゃんといっしょに異世界を支配して幸せな家庭を築きましょ？

Discover the enchanting world of 'Isekai Sister' - a light novel originally written in Japanese that offers a unique blend of fantasy, romance, and supernatural elements. Delve into a story that follows a young man confronted with a surprising proposal from a mysterious girl who claims to be a messenger for his sister in another world. Witness a journey of self-discovery, love, and unexpected twists as the protagonist ventures into a realm where sibling relationships transcend boundaries and societal norms. Unravel the mysteries of sibling bonds, the allure of forbidden love, and the complexities of fate in a narrative enriched with themes of brother complex, incest, and the allure of parallel worlds.