Blue Flag (Ao no Flag) is a coming of age drama manga written and illustrated by Kaito. The story follows Taichi Ichinose, a high school student who reunites with his childhood friend Touma Mita in their final year of school. Their lives become more complicated when Futaba Kuze, a shy classmate who has a crush on Touma, asks Taichi for help getting closer to him. As the three students spend more time together, their relationships become increasingly complex, revealing hidden feelings, emotional struggles, identity questions, and the pressure of societal expectations. Blue Flag manga explores themes of friendship, love, sexuality, identity, and growing up, portraying realistic emotions and character development. Known for its emotional storytelling, mature themes, and realistic high school drama, Blue Flag is considered one of the most emotional and realistic slice of life manga about youth, relationships, and self discovery.

Alternative Titles:
Blue Flag
Ao no Flag
Ao no Furaggu
青のフラッグ
Синий флаг
Die blaue Flagge
Drapeau Bleu
Bandiera Blu
Bandera Azul
Bandeira Azul
블루 플래그
青之旗