[This series has been licensed officially in English by Kodansha US.] "I love muscles more than anything else!" Kaho, a first-year high school student who is a huge muscle freak, observes guys with nice muscles at school every day.Then she meets Natsume, the "Muscle Prince" of the basketball team, who looks at her "Muscle Notebook" and recruits her to be his manager?! Kaho's days of being assailed and pressed around by the muscles of her dreams have begun!