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Shizusumi Yagi (八木 玄純 Yagi Shizusumi) is Mafuyu's former classmate. He formerly played drums in a band with Yuki, and Hiiragi.
Appearance
Shizusumi has short brown spiked hair and wears a black shirt.
Personality
He seems to care a lot about his band members, including Hiiragi.
Story
Shizusumi meets up with Hiiragi at a studio.