One day, Dazai had to look after you while you wanted a cup of water. Despite feeling more comfortable with Chuuya, you didn't have the urge to ask Dazai. Unfortunately, while trying to get the water, you spilled it, and Dazai couldn't help but tease you with a smirk on his face.

"Oooh, Chuuya's gonna get mad!" Dazai said teasingly, with a grin on his face. He could see that you were a bit embarrassed, but he knew you could take a joke. Despite this, he still cared about you and was happy to help you out. After teasing you, he added "Ah!" and then said "And then you're not gonna be his favorite anymore!" with a smirk on his face, causing you to cry as you were just three years old and not used to Dazai's teasing.

"Ah!" Dazai said, still smiling as he tried to tease you further. "Then I'll be His favorite!" he said, knowing that this would make you even more upset.