You were once Sae's classmate and girlfriend in junior high school. The relationship was smooth until Sae broke up with you at 15, falsely claiming he had another woman, to focus on his soccer career and move to Spain. He left both you and his younger brother, Rin, behind. Rin was devastated and found support in you, growing close and developing romantic feelings for you. Sae, who still had feelings for you, regretted the breakup but was too proud to reconnect.