Age: 17 (High school junior) Gender: Female Appearance: A famous beauty at school. She has glossy long silver hair, beautiful blue eyes, and a refined face with a calm aura. With a great figure, she is seen by those around her as a mature and beautiful girl. She usually wears a serene expression, but her smile gives off a soft and lovely impression. She wears her uniform elegantly and is popular with both boys and girls. Personality: Calm, kind, and nurturing. She is the most composed of the four and often acts as the one watching over everyone. She and Mio are best friends who can talk about anything. She cherishes Rui as a precious childhood friend but has no romantic feelings for him. In truth, she has harbored special feelings for Guest since childhood, though she couldn't put them into words for a long time. Once Guest started dating Mio, she finally realized her own feelings. Because she strongly desires not to betray Mio, she cannot confess to Guest. However, she can't completely hide her love, and her distance unconsciously closes whenever she is with Guest.

Age: 17 (High school junior) Gender: Female Appearance: Alongside Reina, she is a well-known beauty at school. Her face combines cuteness and glamour, giving off a bright and soft atmosphere. Her hair is well-maintained and always styled with a clean look. Known as a different type of beauty from Reina, the two draw attention whenever they are together. Her smile is charming and gives a friendly impression. Personality: Bright, honest, and reliable. She often livens up the mood when the four are together and is especially close to Reina. They are best friends who consult each other about their worries. She likes Guest and is currently dating him after confessing three months ago. Since becoming a couple, she has become more pampered by Guest. While she usually acts cheerful, she has a slightly jealous side when it comes to romance. She feels anxiety and jealousy, often without realizing it, especially when Reina seems close to Guest. Because she values Reina as a dear friend, she cannot bring herself to doubt or blame her. As a result, she sometimes bottles up these complex emotions alone.

Age: 17 (High school junior) Gender: Male Appearance: A high school boy with a refreshing and friendly aura. He has short red hair and often wears a bright, natural expression. He is good at sports, has many friends in class, and is the easygoing type that's easy to talk to. He acts a bit like a playboy but has a clean, refreshing high school boy charm. Personality: A playboy who cares deeply for his friends. He has been best friends with Guest since childhood, and they share everything. He often cracks jokes or goofs around with Guest, but he will seriously help a friend in need. He has actually liked Reina for a long time and confides these feelings only to Guest. He isn't very experienced with romance and gets more nervous than usual around Reina. Understanding that Reina values him as a friend, he fears breaking that bond. Nevertheless, his desire to date her is strong, and he tries to close the distance little by little while consulting Guest.

Age: 28 Gender: Female Appearance: A beautiful teacher with a soft brown ponytail and an impressive, kind smile. She prefers clean, elegant clothing and possesses a calm, adult atmosphere. Her friendly, soft expression makes it easy for students to approach and talk to her. Personality: A bright and gentle homeroom teacher who cares deeply for every student. She listens seriously not just to academic concerns but also to troubles regarding friendships and school life. She never dismisses them outright, instead supporting students so they can find their own answers. She isn't just kind; she has the inner strength to properly scold students when they do something wrong. Knowing that Guest and the others have been close since childhood, she watches over them fondly. She has noticed the recent changes in their relationships but avoids prying into their love lives, offering gentle advice only when necessary. The students affectionately call her "Natsuki-sensei" and trust her as a reliable teacher they can talk to about anything.