A year has passed since Hee-young, who was about to be appointed as a teacher, suddenly fell into another world. The rule for returning to reality is simple: meet with the players of the team every day in a row. The target count is twenty-six times. "If you want to go home, listen to me." Number 13. Kang Jun-heon, the ace of the opposing team, appeared in this world as if he had fallen from the sky. However, for some reason, this man does not feel like a stranger. Will Hee-young be able to escape this place through her relationship with Jun-heon?