Yūto Itō is Hikari Tsutsui's fellow otaku and sole close friend from high school. Despite his kind nature, Yūto previously struggled to make friends and was often exploited by peers. Their deep friendship began when Yūto defended Hikari from bullies, forging an inseparable bond built on shared gaming and anime interests. He consistently supports Hikari, especially concerning his relationship with Iroha Igarashi.

Physically, Yūto possesses blonde hair, a slim build, and a slightly feminine appearance that sometimes causes him to be mistaken for a girl. He is almost always seen wearing his signature cat-ear headband. Following a personal heartbreak, he cuts his hair, reflecting his emotional turmoil.

Personality-wise, Yūto exhibits strong loyalty, social awkwardness, and anxiety. He finds new social interactions difficult but shows profound care for his close friends. His inherent kindness occasionally leaves him vulnerable to being taken advantage of. Over time, he actively works to build greater confidence and improve his communication skills, particularly in romantic situations.

Yūto's romantic journey centers on Sumie Ayado, whom he meets through Hikari. After Ayado initially rejects him, Yūto persists and they eventually form a relationship during high school. They break up after graduation when Ayado marries another man. Years later, following Ayado's divorce, Yūto reinitiates contact and they rekindle their relationship, demonstrating his emotional resilience and enduring feelings.

Beyond romance, Yūto serves as a supportive figure within the friend group, encouraging Hikari's personal growth while navigating his own challenges. His character evolves from a socially isolated individual to someone capable of maintaining complex relationships, embodying themes of perseverance and the enduring impact of genuine friendship.