Takano Ichigo Manga

From Day of the River:One day, Takamiya Naho receives a letter written to herself from ten years in the future. As Naho reads on, the letter recites the exact events of the day, including the transfer of a new student into her class named Naruse Kakeru.The Naho from ten years later repeatedly states that she has many regrets, and she wants to fix these by making sure the Naho from the past can make the right decisionsespecially regarding Kakeru. What's more shocking is that she discovers that ten years later, Kakeru will no longer be with them. Future Naho asks her to watch over him closely.

While loitering in the park, Shimana Kameko, who intended to run away from home and skipped school, meets a suspicious man in a kimono. This man, who had been locked out of his house, offers Shimana a place to stay. However, he requests she fulfill three conditions in exchange for her tenancy!?