Ruka Sawaguchi is a 20-year-old who is currently in her second year at a technical school. She had experienced heartbreak during her high school years due to her first love, and has since been unable to pursue another romantic relationship. However, one day, she met Soushrou by chance. Despite his initial annoying behavior, Soushrou unknowingly eliminated Ruka's emotional pain and replaced it with excitement, eventually leading her to fall in love with him. Unknown to her, Soushrou is only 16 years old.
