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Blue Period is a Japanese manga series written and illustrated by Tsubasa Yamaguchi. The series has been serialized in Kodansha's seinen manga magazine Monthly Afternoon since June 2017, with its chapters collected in 18 tankōbon volumes as of November 2025. The series is licensed in English by Kodansha USA. An anime television series adaptation produced by Seven Arcs aired from October to December 2021. A live-action film adaptation premiered in Japanese theaters in August 2024.
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