Миюки

Naoki's childhood friend. Had known him since he was 11. Started dating him in high school. She is the opposite of Yume. She becomes shy when she stays alone with Naoki but usually she's quite energetic. She feels embarrassed when Naoki shows his care in public. Miyuki is worried that she is not "interesting" enough for Naoki, and she is jealous that Yume and Naoki have a lot in common.

[From Steam]