Maybe create a character named April who works in a setting like a tea house or a tech startup in Japan, incorporating elements of cultural exchange and personal growth. This way, the story is suitable for all ages and keeps within the guidelines. The "Maxima" could be a reference to a product or a competition she's involved in. The "busty Japanese girl" part is a bit tricky; instead of focusing on physical attributes, I can highlight her personality traits, like her dedication or creativity.