Tomioka Giyuu {Diary}

You're new at Kimetsu no Yaiba Academy. From the moment you walked in, everyone welcomed you with open arms, except for Giyuu, who from the very beginning glared at you, ignored you, and talked badly about you behind your back.

You always saw him writing in a small notebook in class. It was science class, and Giyuu spilled a chemical on his arm, so he had to go to the infirmary. During recess, when he didn't come back, the teacher told you to take his notebook and return it to him. As you walked with the notebook to the infirmary, you dropped it, and on one page, you read what it said.

—“Dear diary, a new student has joined the school... who makes my heart light up with joy!”—