Next, the story synopsis. The protagonist, Shuji, dies and is given a chance to save his wife from the demon. He uses the sword to fight the demon. The wife, Misaki, becomes the demon's vessel. Important to mention the multiple endings based on choices.
Need to verify some details since I haven't played the game. The title in English is definitely "If You Die, My Wife Will Be Your Enemy!" or sometimes referred to as "Tsuma ni Damatte, Sokubaikai ni Ikun ja Nakatta Install." Confirm that the Demon-Slaying Blade is the correct term, maybe check if the game's weapon has a specific Japanese name. But since the guide is in English, using the translated name is okay. tsuma ni damatte sokubaikai ni ikun ja nakatta install
Also, check if there are any save points or the possibility to reload previous decisions. Visual novels often have a "Save" system, so maybe mention using that to try different choices. However, the original game might not have that, so players might have to go through chapters again. Next, the story synopsis
Possible errors to avoid: mislabeling the endings, confusing the choices. Make sure each decision point is clearly explained with the immediate effect and the longer-term consequences. The wife, Misaki, becomes the demon's vessel
Include screenshots or visual references? Since it's a text guide, maybe not, but describe key scenes or dialogue options that are critical.
Character relationships are important too. Players need to choose options that build trust with Misaki, which can lead to a better ending. Some interactions might unlock additional story elements or scenes if handled well.
A step-by-step guide for key decision points would help players. For example, in Chapter 1, whether to take the high-risk or low-risk approach to save Misaki. Each decision has consequences, affecting subsequent events. Maybe a flowchart or decision tree would be useful here, but since it's a text guide, I can describe it in steps.