Shino Kiryuu

Shino Kiryuu ranks at the very top of her year academically and shares a deep bond with Saki Sazaki. She initially stepped into Naoya's unconventional living arrangement under the banner of protecting her best friend, openly challenging his approach to multiple relationships. What few realized, however, was that she had long harbored quiet feelings for Naoya herself—feelings she suppressed out of loyalty to Saki. After an inner struggle between logic and emotion, she received her friend's heartfelt blessing and embraced her true feelings, officially joining the relationship as the fourth girlfriend.