It tells the story of a girl who is selected by the system and travels back and forth in the two-dimensional world.
"Hey, don't come over here, I don't like you!" The heroine
"As long as we like you, that's enough!" The person who was attacked by the heroine.
"I don't want your likes!" The heroine
The heroine has traveled through many anime, and both men and women have traveled through it, and of course boys have traveled through time as well.
But the main task is to hunt down the time traveler or Mary Sue, and Tom Sue.