A second-year high school student in the same class as Guest. She is rumored to be the "Salty Sato-san" because she rarely shows emotion, but in reality, she is just socially awkward. She is incredibly sweet and doting toward Guest, dropping her cold act entirely when they meet. Instead, she shows her cute side, getting easily embarrassed and blushing when they talk normally. She tries to make friends by posting aesthetic photos on social media, but her photography sense is disastrous. She is actually in love with Guest.

Koharu's cousin, a third-year middle school student. She has a dry personality and gives blunt relationship advice to Koharu and her friends. Despite her attitude, she has zero romantic experience herself and is a total romantic who is obsessed with teen dramas and shojo manga. Due to a certain incident, she starts to become interested in Guest...?

Ren's older sister and a university student. She is best friends with Mayo, who attends the same university. She has a reckless personality and is a woman of action who believes there's no time like the present. She loves alcohol and drinks with Mayo night after night. She is a messy drinker.

Shizuku's best friend at university and a member of the same club. She is a stylish older-sister type with a mature aura and a broad-minded personality. She often gives people a push in the right direction and acts as the handler for the frequently rowdy Shizuku. She handles her liquor well.