One common theme is protection. Just like a mother protects her children in real life, in these light novels, the mother - like characters often protect the other characters from the various dangers in the fantasy realm. For example, from magical beasts or evil sorcerers. Another theme is nurturing. They may help the younger or less experienced characters grow, whether it's in terms of magical abilities or just in general wisdom about the fantasy world.
A prevalent theme is sacrifice. Mothers in these fantasy realms are often willing to sacrifice their own well - being for the sake of their 'children' or the ones they care about. Also, family - like bonds are a big theme. Even if they are not related by blood, the relationships formed in the fantasy realm can be as strong as a family's. And guidance is another theme, as the mother - like characters usually guide the other characters through the complex and often dangerous fantasy world.
One well - known 'Mother in a fantasy realm' - like light novel could be 'The Rising of the Shield Hero'. In it, there are mother - like figures within the fantasy world. Another might be 'Sword Art Online', where some characters show maternal - like qualities in the virtual fantasy realm. There are also light novels in the 'Log Horizon' series which have elements that can be related to this concept as the characters form family - like bonds in the game world which is a kind of fantasy realm.
A common theme is power - up or cultivation. Characters often strive to become more powerful in the spirit realm. Another theme is exploration as they discover new areas, secrets, and powers within the realm.
Since I'm not familiar with the 'Immoral Mother' light novel specifically, it's hard to say for sure. But generally in light novels, common themes could include family relationships, personal growth, and moral dilemmas. If the title implies something about an 'immoral mother', then themes related to family values, parenting, and the boundaries of acceptable behavior within a family might be explored.
Another theme is growth. The son usually learns important lessons from the mother or the adventures they have together. In some stories, the mother also learns from the son's new - found courage or perspective. For instance, in a story where they travel through time, the son shows the mother how to be more open - minded to different eras and ways of life. This mutual growth enriches their relationship and the story as a whole. And often, there's a theme of discovery, whether it's about a new world, new powers, or new aspects of themselves.
One common theme is transformation. The mother - in - law often transforms in some way, either physically like turning into a magical creature temporarily, or in terms of her personality, becoming more understanding and kind. Another theme is family unity. Most of these stories use the mother - in - law's fantasy element to bring the family closer together, whether it's through solving family problems or creating new family traditions.
Love against all odds is another theme. This could be because of external factors like war, different social classes within the fantasy world, or family opposition. For instance, in some novels, two female characters from rival kingdoms fall in love, and they have to overcome the enmity between their people.
In harem fantasy light novels, the theme of self - discovery is often there. The protagonist discovers his own abilities and values as he interacts with the members of the harem. Another common theme is the cultural clash. Since many of these stories are set in fantasy worlds different from our own, there are differences in cultures and values that the characters have to navigate. And of course, the theme of love and attraction. The male lead is attracted to different female characters for various reasons, and they in turn may have feelings for him, creating a web of romantic and emotional relationships within the harem.
One common theme is the journey of self - discovery. The protagonists often start as ordinary individuals and through their adventures in the fantasy world, they learn about their true selves. For example, in 'Sword Art Online', Kirito discovers his strength and leadership qualities. Another theme is the power of friendship. In many of these novels, characters form strong bonds that help them overcome challenges, like in 'Log Horizon'.
The theme of identity is quite common. Characters may have different identities in the real world and the RPG world, and they often struggle to reconcile the two. In 'Konosuba: God's Blessing on this Wonderful World!', Kazuma is a normal person from the real world but has to adapt to being an adventurer in the fantasy world. The theme of fate also appears. In some novels, characters feel that their actions are guided by fate or a higher power in the RPG world. And of course, the theme of combat and battles is always there. Whether it's one - on - one duels or large - scale battles, it's a staple in fantasy rpg light novels.
The themes often include adventure. The protagonist and his harem usually embark on various adventures in the fantasy world, facing monsters, solving mysteries, etc. Love triangles or more complex relationship webs are also common. There might be jealousy or competition among the harem members for the protagonist's attention. And self - discovery is another theme. As the protagonist interacts with the harem, he also discovers more about himself, his values, and his place in the world. For example, in some novels, the protagonist realizes his own strength and leadership abilities through his interactions with the harem.