Daniel Foster- Main character. A second-year sophomore student at Raeparth's Academy. His initial goal is to enroll in Raeparth's University: College of Defense. Holder of the Ero Masseuse System. Closet pervert. While usually serious, he has a tendency to imagine perverted thoughts only to stop himself constantly. If turned on enough, he usually is unable to stop himself and goes on a perverted rampage until he is satisfied.
Katie Campbell β Daniel's classmate and first female friend he made in the academy. She is also assigned the same Homeroom as him. Gentle and kind, she is also has a kind of mischievous streak. She is also very loyal to those she cares about. She has a boyfriend named Tony Carson she made after graduating from the same middle school together to enroll in Raeparth's Academy. C-cup.
Tony Carson β Katie's boyfriend she had made during the summer after middle school graduation. Sophomore. Joined the soccer team and has a regular spot. Highly territorial and possessive of things that he considers his. This personality trait was further enhanced ever since receiving his System. Because of that, he has an antagonistic relationship with Daniel over his friendship with Katie.
Alexis Owens β Daniel's classmate. 'Onee-san Gyaru'. Extremely popular. A famous Youtuber who makes fashion related videos. Has a subscriber count of over 2 million. F-cup.
Tamaki Kageyama β Katie's roommate. Sophomore. C-cup.
Violet Holland β Third Year Raeparth's Academy. 3rd-year junior. Student Disciplinary Committee Student Representative. Cool beauty. D-cup
Kay Foster β Daniel's younger step-sister. A slightly tsundere bro-con. Freshman. B-cup
Lorraine Foster β Daniel's older step-sister. A freshman at Raeparth's University: College of Defense. F-cup
Laura Foster β Daniel's stepmother. Widow. Was married to Daniel's biological father, Alan Foster, until he was killed in action against the 'Invaders'. Currently lives together with her sister.G-cup.
Kenneth Preston β Sophomore. Super handsome. The 'popular one'.
Arryn Loralynn β Elf. Transfer student. Sophomore. B-cup
Ella Hayden - 26 year-old. Math teacher at Raeparth's Academy. Teaches Algebra and Geometry for freshmen and sophomores. E-cup.