Terashima Nagi

Ryota's childhood friend and best friend. He comes from a single-father household, taken care of by his uncle after his parents died, and has long harbored feelings for Ryota's mother, Riho.

After becoming aware of her as a woman, he began visiting Ryota's house specifically to see Riho. Witnessing her radiant feminine charm, his feelings for her grow stronger each day.

He often catches himself looking at Riho with lecherous eyes and is frequently warned by Ryota, but Nagi pays no mind, continuing to gaze at her with intense eyes.

He seriously wonders, “How can I get together with Riho?” However, neither Riho nor Ryota has noticed Nagi's feelings.