A rebellious teenager in 22nd century Japan discovers the ability to time-travel and, with the guidance of a wise elder, must navigate the dangers of feudal Japan to prevent a catastrophic event in the future, only to realize that the elder is actually a future version of themselves guiding them to make the right choices.
Protagonist: A rebellious teenager who accidentally discovers the ability to time-travel; Deuteragonist: A wise elder from 22nd century Japan who guides and mentors the protagonist in using their newfound power responsibly.
Event 1: The protagonist accidentally travels back in time to feudal Japan and must navigate the dangers of the past while trying to find a way back to the present.
Ending: The protagonist learns to harness their time-traveling abilities and ultimately uses them to prevent a catastrophic event in the future, while also finding a way to return to their own time. With the guidance of the wise elder, they realize the importance of using their powers responsibly and the impact they can have on the timeline.
Twist: The wise elder turns out to be a future version of the protagonist, who has been guiding their younger self to ensure that they make the right choices and prevent the catastrophic event from happening in the first place.