There could be a theme of mystery as well. The 'estrus' part of the estrus gymnasium gives an air of the unknown. What is special about this gymnasium? What secrets does it hold? These questions could drive the plot and add an element of mystery to the light novel.
I'm not sure if there are specific well - known light novels directly related to 'estrus gymnasium'. It might be a very specific or even a made - up concept. However, there are many light novels in the general sports or school - life genres that could potentially have some tangential connections.
I recommend the book "Longevity Martial Arts: Starting from Adding Points to Xingyi Fist" to you. The main character's surname was Xiao. He used medicinal water to practice the Iron Shirt. Later, he practiced the Xingyi Fist and entered the Xingyi Sect. In the end, he participated in the competition in the stadium. I hope you like this fairy's recommendation. Muah ~π
One thing that makes cartoon people drawings easy is avoiding too much detail. Keeping the features basic and exaggerating certain aspects, like big eyes or a big smile, can make it simpler. Also, having a consistent style throughout helps.
The main difference is usually in the style. Horse cartoons might focus more on character expressions and cuteness, while comic strips might have a stronger storyline and more complex panel arrangements.
A pie eyed cartoon is appealing because the exaggerated eye size creates a sense of expressiveness. It allows the characters to convey emotions more vividly. Also, the simplicity of the style can be visually appealing and easy to remember.