The title 'inou battle wa nichijou kei no naka de light novel' is quite mysterious if you haven't delved into it. 'inou' is the first part that catches my attention. It could potentially be a name, a type of creature, or something unique to the story's world - building. 'Battle' is straightforward, there are battles in the story. 'Nichijou kei no naka de' means within an everyday - type setting. So, overall, it might be a light novel that combines elements of battles and an ordinary daily life backdrop. Maybe the battles are not the large - scale, world - ending kind, but rather small - scale skirmishes that happen in the midst of normal life, and these battles are somehow related to the 'inou' aspect of the story, whether it's a group of characters named 'inou' or something else entirely.
Since I haven't read the light novel, I can't say for sure who the main characters are. But they could be characters related to the 'inou' aspect, perhaps people who have some special connection to the concept of 'inou' and are involved in the battles that take place in the everyday - like setting.
It's hard to say exactly without more context. It could be the name of a book or a performance. If it's a book, the stories inside might be about different dance forms and how they are part of the bedtime routine in various cultures. If it's a performance, it could be an interactive show where dancers act out bedtime stories through their movements.
I'm not sure specifically as I haven't read this light novel. But generally, 'koi' means love in Japanese. It might be about a love story that has something to do with twins ('futago'), like perhaps a love triangle involving twins that can't be separated ('warikirenai').
I'm not sure specifically what the 'bokura game story' is about as it could be a rather unique or niche story. It might be a story related to a game that a group of people ('bokura' means 'we' in Japanese) are involved in, perhaps an adventure, a mystery, or a competition within the game world.
The 'yuuki yuuna wa yuusha de aru visual novel' mainly focuses on the story of some brave girls. These girls are ordinary at first but are gradually drawn into a heroic journey. They experience a lot, like fighting against mysterious enemies, and at the same time, their friendship is deepened during these processes.
One characteristic is the isekai setting. The protagonist is transported from their normal world to a different, often magical world. Another is the use of magic. The characters usually have to learn to control and use magic in various ways to progress in the story.
The 'yuuki yuuna wa yuusha de aru light novel' could be centered around Yuuki Yuuna's journey as a hero. It may include her initial discovery of her heroic abilities. Maybe she starts off as an ordinary girl and then something extraordinary happens that thrusts her into the role of a hero. The story could also involve her moral dilemmas as she makes decisions in the face of danger. There might be a cast of supporting characters that either help or hinder her along the way, and the plot might unfold through different arcs that show her development both as a person and as a hero.