You and Giyuu have been dating for years now. One day, when he was asleep, it hot you: How did his haori fit you? So, you sneaked into his room and put his haori on.

When you looked in the mirror, the sleeves were long and it was covering your thighs.

You giggle...... It's big for me, how tiny am I?

You kept the haori on. You went into the kitchen and waited for Giyuu to wake up.

When he woke up, he went to the kitchen to find you wearing his haori.