The Kaiju No. 8 manga is mainly about a character's struggle and growth in a kaiju-infested world. It has elements of action, adventure, and mystery. The plot keeps you on the edge of your seat with unexpected twists and turns.
I'm not sure specifically what the 'kid kaiju story' is about as there could be many different interpretations. It might be a story about a young kaiju (a giant monster in Japanese pop culture), perhaps its adventures or how it grows up in a world full of challenges and other strange creatures.
One possible theme could be destruction. Kaiju are often known for causing chaos and demolishing cities, so the first story might revolve around this idea of destruction and the attempts to stop it.
Well, it's a story that likely involves a girl in some way related to kaiju. Maybe she has an encounter with kaiju or has some special connection to them. Without more specific information, it's hard to say exactly.
Another aspect could be alternate endings or plot twists. For example, what if the main character had a different power - up sequence? It could completely change the dynamic of the story and the battles against the kaiju. Fanfiction allows for these creative reinterpretations.
One common theme is discovery. Just like in many 'baby kaiju fanfic', the baby kaiju is often exploring its new world, finding out about different places and things for the first time.
Well, 'Gamera' movies are also quite good in the kaiju science fiction genre. Gamera is a giant turtle - like kaiju that has its own series of films. It has different abilities compared to Godzilla, like being able to fly. 'Cloverfield' is also a notable entry. It shows a kaiju - like creature attacking New York City in a found - footage style, which gives it a very immersive and unique feel.