Blue Period (Japanese: ブルーピリオド, Hepburn: Burū Piriodo) 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 and has been collected in eleven tankōbon volumes as of September 2021.
Second-year high school student Yatora Yaguchi is bored with his normal life. He studies well and plays around with his friends, but in truth, he does not enjoy either of those activities. Bound by norms, he secretly envies those who do things differently.