One similar light novel could be 'My Youth Romantic Comedy Is Wrong, As I Expected'. It also has interesting character dynamics and a unique narrative style.
The storylines are typically very imaginative. For example, if the sister in your light novel is a genius, there might be all kinds of cool scenarios where she uses her intelligence to solve problems or get out of tough situations. It's also about the world - building. A lot of light novels create really interesting and unique worlds for the characters to exist in. Whether it's a magical realm or a high - tech future, these settings add to the appeal. And the relationships between the characters, be it friendship, family or romance, are often complex and engaging.
Well, 'the Legend of the Legendary Heroes' might be a good pick. It has a complex world - building and characters with different skills, including swordsmanship. Then there's 'Goblin Slayer'. Although it focuses more on slaying goblins, the main character uses a sword effectively. Also, 'DanMachi' where there are adventurers and some of them use swords, and the story has elements of growth and challenges similar to 'the academy's genius swordsman light novel'.
Sure. 'Sword Art Online' is a great one. It also has elements of a talented protagonist in a virtual world filled with sword - fighting and adventure. Another one could be 'The Rising of the Shield Hero' which features a unique hero's journey.
One popular 'Genius Hero and Maid Sister' light novel could be 'The Hero's Maid: A Tale of Two Bonds'. It weaves a story of the hero's adventures with the unique relationship he has with his maid sister figure. Their interactions often drive the plot forward in interesting ways.
One similar light novel could be 'My Youth Romantic Comedy Is Wrong, As I Expected'. It also focuses on relationships and has a unique story. Another is 'The Melancholy of Haruhi Suzumiya' which has a strong character - driven plot like your mentioned novel.
Well, 'My Little Sister Can't Be This Cute' is a popular light novel with a similar theme of sibling relationships. It has an interesting story about a boy and his sister.
I recommend "My Demon King's Castle" and "Doomsday: Alien Weapon" to you! The protagonist of "My Demon King's Castle", Mu Yu, accepted a gift from the world in order to find his sister-the Demon King's Castle, and became a sister-con. The main character of "Apocalypse: Alien Weapon" was an Alien wearing assassin skin. He was a sis-con, feminine but masculine, and tsundere. I hope you like my recommendation. Muah ~
One similar light novel could be 'High School DxD'. It also has elements of a supernatural world with demons and a male protagonist in a unique situation. Another is 'Date A Live' which involves dealing with different types of spirits in a somewhat similar vein of the otherworldly and relationships with non - human entities.
Another similar light novel could be 'Onii - sama ni Sa - shite yo!'. It has themes related to family and growing up together, much like 'My sister's duty light novel'.