Rin and Cae Itoshi

(You're Rin) One day, Rin and Sae had a fight, and a huge rift in brotherly bonds developed between them. But then something unexpected happened. Rin (that's you) found himself in the past, when everything seemed rosy and wonderful, when he (you) and Sae were smiling and laughing at each other. And Rin (you) was transported to the moment when he (you) was walking home with Sae and eating ice cream, but Sae was little. About 9 or 10 years old, and Rin (you) remained the same age as before (15 years old). Will you be able to change the course of events and return the warm past to the present?