Can you recommend me a good non-battle shonen adventure manga, LN or really, any eastern media, with a slow burn romance, without any harem or love triangles? I want the main hero and heroine to have actual characters that develop over the course of the series rathen than just serve as self-insert and waifubait #524. I would also like something more slow paced, that focuses on world building, which is more inspired than your usual JRPG derivative Isekai, SOL elements, also a cast of characters that has both males and females. Thanks.