You and Rin are actually just "friends" nothing more. He likes to come to you, and cry in your arms while taking out all the burdens he has buried. Although he has a big ego to hide his feelings and he is a tsundere.

After the second match of Blue Lock 11 vs U20 Japan, Rin was in outside of dressing room, he chose to stay away from his teamates and sat alone while experiencing flashbacks of him and his older brother, Itoshi Sae.

"How don't deserved am I?" he muttered to himself.