Most likely not. Many such stories are made up to evoke certain emotions or tell a compelling tale rather than being based on real events. Sister Death might fall into this category.
I'm not sure. It could be a real story that's been fictionalized for dramatic effect, or it could be entirely made up. You'd have to do more research to know for sure.
There were a few novels related to his sister's death that he could recommend. One of them was " My sister is dead. I, with personality disorder, am determined to take revenge!" " After My Sister Passed Away, I Reincarnated to Take Revenge ". These novels were famous for their emotional descriptions and imagination, telling the story of the protagonist after his sister's death. These novels may have provided the plot of the sister's death and the protagonist's revenge.
Most likely not. Usually, such stories are works of imagination and not based on real-life happenings. The plot and characters are crafted by the author's creativity rather than real experiences.
Maki in fanfiction usually has a fierce loyalty to her friends, especially Yuta. She is the type to fight for what she believes in. Yuta is sometimes portrayed as being a bit naive in the ways of the world outside his own small circle, but his pure heart makes him endearing. In many stories, their different personalities create an interesting dynamic, like in a story where Maki's boldness gets them into a risky situation and Yuta's calm thinking gets them out.
There was a maki that was said to be a ghost. It haunted a particular forest. Hunters would often report seeing a white, maki - like figure darting between the trees. Some thought it was the spirit of a maki that had died in that forest long ago. One hunter even claimed that the maki ghost led him out of the forest when he was lost, as if it had a kind heart despite being a ghost.