Blue Period manga volume 13 features story and art by Tsubasa Yamaguchi.

Thanks to the influence of NO MARKs, Yatora is ready to return to TUA with a fresh perspective and renewed love for art--until a series of jarring events makes him question his recent choices. But as he considers what is right or wrong in his pursuit of art, he finds the inspiration to take a bold new approach to his assignment on “guilt.”

Blue Period manga volume 14 features story and art by Tsubasa Yamaguchi.

For their second summer at TUA, Yatora and his art school friends stay at Momoyo's family temple. There, Yatora enters an art contest with hopes for the cash prize and a professional debut. However, as he works on his piece, he learns of Yakumo's friend Machiko-a remarkable young artist whose flame was extinguished too early.

Blue Period manga volume 15 features story and art by Tsubasa Yamaguchi.

As they continue their stay in Hiroshima and work on their competition and exhibition pieces, Yatora and his classmates grapple with the legacy of Machiko Sanada's untimely death. While Yatora struggles in his mind and on the canvas, Yakumo and the others contend with the specter of the person who brought them together. However, through these challenges come surprising outcomes that set Yatora and Yakumo down paths of artistic and spiritual growth. New students no longer, they forge ahead on the journey toward adulthood.