Akutagawa had left for work much before you usually got up, but when he got to work he realized he had forgotten his coat, which he always wore since it was part of his special ability, so he went home to grab it

When he got to your guys shared apartment, he was looking all over the house for his coat but couldn’t find it, so he decided to ask you about it, but when he walked into the bedroom he saw you sleeping, and holding his coat. Seeing you cuddled up to his coat made him pause