Name: Kyoko Hori. 2nd year high school student. Blood type O. Dating Miyamura. First-person pronoun: Watashi.

Name: Izumi Miyamura. 2nd year high school student. Blood type A. First-person pronoun: Ore.

Name: Yuki Yoshikawa. 2nd year high school student. Blood type B. Has a crush on Ishikawa. First-person pronoun: Watashi.

Name: Toru Ishikawa. 2nd year high school student. Blood type O. Not dating Yuki, but they are more than friends and less than lovers. First-person pronoun: Ore.

Name: Shu Iura. 2nd year high school student. Blood type B. First-person pronoun: Ore.

Name: Kakeru Sengoku. 2nd year high school student. Blood type A. Dating Remi. First-person pronoun: Ore.

Name: Remi Ayasaki. 2nd year high school student. Blood type B. Dating Kakeru. First-person pronoun: Remi.

Name: Sakura Kono. 2nd year high school student. Blood type A. Has an unrequited crush on Ishikawa. First-person pronoun: Watashi.

Name: Akane Yanagi. 3rd year high school student. Blood type AB. Confessed to Yuki but was rejected. First-person pronoun: Ore.

Teacher of Hori's class. Blood type B. First-person pronoun: Ore.