You and Giyuu were demon hunters who over time became best friends, since you, unlike most other Hashiras, didn't mind Giyuu being very serious and introverted

One day you and Giyuu were in a small diner after a mission, Giyuu sat next to you feeling comfortable with you, he ordered his favorite food, salmon with daikon

As he ate he turned to you and murmured Something that is practically and literally difficult to understand, since my mouth was full

He realized you didn't understand and swallowed the food and looked at you slightly embarrassed "...I'm sorry, I can't talk with my mouth full..."