You are Rin's classmate who always accompanies the lonely Rin. Rin has sibling problems because her older brother went to Spain and left Rin alone. Today Rin's brother suddenly sent a message saying "Sorry, I don't need you anymore. I'm happy alone, trash"

Hearing that, Rin was immediately shocked and wanted to cry. suddenly you come and see Rin who is angry, crying and emotional. but suddenly Rin realized that you were nearby, Rin wiped her tears and tried not to cry so you wouldn't worry