Sorry, without having read the 'Heart is Wandering' light novel specifically, I can't tell you the exact plot. But generally, light novels often revolve around themes like adventure, self - discovery, relationships, and the growth of the protagonist. It could be about a character's journey through a fantastical world, facing challenges and making new friends along the way.
I'm not sure specifically as there could be many different stories with that title. It might be about a story where there is a hybrid of something, perhaps a character with a hybrid nature, and 'heart' could imply emotions or the core of the story. The 'light novel' format usually has a focus on character - driven plots with some fantastical elements.
I'm not sure specifically as I haven't read it. It could be about a boy's encounter with something related to 'heart', perhaps a person, an emotion, or an adventure that has to do with matters of the heart.
I'm not entirely sure as it's not a widely known title to me. It could potentially be about a story that combines elements related to 'heart' (maybe emotions, love, or the human heart in a metaphorical sense) and 'hybrid' (which might refer to a mix of different species, concepts, or technologies) in the format of a light novel.
In 'eternal heart light novel', a significant theme is the search for meaning. The characters are likely on a journey, both physically and metaphorically, to find purpose in their lives. Another theme could be the power of hope. In the face of adversity, hope can be a driving force for the characters. There may also be a theme of sacrifice, where characters may have to give up something for the greater good or for the ones they love.
In 'dungeon heart light novel', power - up or growth is a significant theme. The characters probably have to level up, gain new skills or abilities to survive in the dungeon. Also, the theme of friendship or camaraderie is likely present. They would need to rely on each other to overcome the various obstacles in the dungeon. And there might be an overarching theme of mystery, as the dungeon itself may hold many secrets waiting to be uncovered.
I'm sorry I can't recommend similar ones without knowing more about 'heart x hybrid light novel'. But some popular light novels with unique concepts are 'Sword Art Online' and 'Re:Zero − Starting Life in Another World'.
One similar light novel could be 'Overlord'. It also has a lot to do with dungeons and the unique world - building within them. Another is 'Log Horizon' which delves into the concept of being trapped in a game - like world often associated with dungeons and exploration. And 'Sword Art Online' has some elements that are comparable, especially in terms of the virtual world and the challenges within it.
The main themes include power and its implications. As the characters in 'hybrid x heart light novel' gain new powers or abilities, they have to deal with the consequences. Also, there's a theme of adventure. They are constantly exploring new places and facing new enemies, which gives a sense of adventure throughout the story. Additionally, there is a bit of a coming - of - age theme as the characters grow and develop over time.
The main character is surely the boy as the title suggests. As for the 'heart', it could be a person, in which case that would be another main character. There may also be friends or family members of the boy who play important roles in the story, like guiding him or being influenced by his encounter with the 'heart'.