I'm not entirely sure as I haven't experienced this visual novel specifically. But generally, a visual novel often has a story line involving characters. Maybe it's about female warriors with some unique characteristics, like in many visual novels where there are adventures, relationships, and challenges that the characters face.
One common theme is the crossover of powers. For example, Naruto's ninja techniques might be combined with the Sailor Senshi's magical powers. It creates a new and exciting dynamic.
Kuchisake - Onna has a rather eerie real story. Legend has it that she was once a beautiful noblewoman. But because of her excessive pride in her looks, she was punished in a cruel way. After her transformation into a malevolent spirit, she wanders, especially at night. People in Japanese folklore were very cautious of her, as her presence was seen as a sign of impending doom in some cases.
The 'kuchisake - onna' is a Japanese ghost story. It's about a woman with a slit mouth. Legend has it that she was a beautiful woman who was punished by having her mouth slit from ear to ear. She now wanders, often wearing a mask and asking people if they think she is beautiful. If they answer no, she kills them; if they answer yes, she removes her mask and asks again, and if they show horror at her slit - mouth, she also kills them.
The kuchisake - onna has an origin story rooted in Japanese superstition. Legend has it that she was a vain and proud woman in her past life. Because of her beauty, she was unfaithful to her husband. As a punishment, her mouth was cut horribly. Now as a spirit, she roams, preying on the fear of others. She approaches people and asks if they find her attractive. Depending on the response, she either spares or harms them.
Definitely not. Kuchisake Onna is a fictional creation, part of the rich world of Japanese supernatural tales. These kinds of stories are often used to scare or entertain rather than being factual.
Yes, there are different versions. One version might emphasize the moral aspect more, like her being punished for vanity and infidelity. Another could focus on the tragic accident that led to her disfigurement rather than a punishment. Some stories may also have different details about how she became a spirit, whether it was a sudden transformation or a slow process of her negative emotions building up after her death.
Another great one is 'Naruto's Sailor Moon Adventure'. It's a fun read where Naruto somehow gets involved in the Sailor Moon's battles and quests. The author does a great job of mixing the two storylines, and the character development of Naruto within the context of the Sailor Moon world is quite engaging.
I haven't read this novel specifically. But generally, it might explore the relationship between the characters, perhaps with themes of youth, identity, and unique personalities. Maybe the 'end of novel' part implies a conclusion to the story arcs of the denpa onna (a girl with some special or 'radio wave' - like characteristics) and the seishun otoko (youthful boy).