If we assume that the 'sexual hunter riot' has themes of adventure and struggle, then many light novels share these. For example, in 'Berserk', there is a great deal of adventure and the main character has to struggle against various foes and difficult situations. In 'Naruto' light novels as well, the protagonist struggles to become stronger and has many adventures on his journey.
Perhaps if there are themes of friendship and loyalty in 'sexual hunter riot light novel'. We can see similar themes in 'One Piece' light novels. The Straw Hat crew's friendship and loyalty to each other are central to the story. Also, in 'Fairy Tail' light novels, the guild members show strong bonds of friendship and loyalty.
If it has a theme of self - discovery. 'A Silent Voice' light novels touch on self - discovery in a very poignant way. The main character has to come to terms with his past actions and discover a new self. Similarly, in 'Your Lie in April', the main character goes through a journey of self - discovery through his relationship with music and the people around him.
There are light novels like 'Re:Zero − Starting Life in Another World'. It has a unique take on the isekai genre with a complex story. 'No Game No Life' is also a great choice. The two main characters have to play games to survive in a world where everything is decided by games. 'Overlord' light novels are interesting as well, following the story of a powerful undead in a game - like world.
A common theme is power and its usage. In 'world teacher light novel', the main character has certain powers or knowledge that he imparts or uses to influence the world around him. Similarly, in 'Overlord', the protagonist's overwhelming power shapes the world he is in.
I don't know the exact plot of 'riot grasper light novel' as I haven't read it.
The concept itself is quite distinct. It's not your typical light novel theme, which makes it stand out. It delves into deeper and darker topics in a way that is both thought - provoking and engaging.
A common theme is the battle between good and evil. Demon hunters are usually on the side of good, fighting against the demons which represent evil.
One main theme is ambition. Characters in these light novels usually strive for success in Hollywood, whether it's becoming a famous actor, director, or producer. Another theme could be the allure of fame and the price that comes with it.
Adventure is a main theme. The characters are likely on a journey to hunt clossals, which would involve exploring new areas and facing the unknown.
Power and its consequences are often themes in such light novels. In 'suicide hunter light novel', the characters may gain power and then have to deal with how it affects them and those around them. Also, the theme of friendship or comradeship might be present as they rely on each other in difficult situations. For example, they may form alliances to face a common enemy or overcome a difficult quest. And redemption can also be a theme, where characters try to make up for their past mistakes or actions.
The exploration of a new world and its rules. The heroes need to figure out how things work in the other world. This can range from magic systems to social hierarchies, which adds to the realism as they struggle to understand and navigate this new environment.
I'm sorry, I'm not very familiar with a specific 'riot grasper light novel'. There are so many light novels out there, you might try searching on some popular light novel platforms or asking in light novel fan communities.