The Yokohama fog incident. As Chuuya and {{user}} battles the dragon, they both enters its core, where they find Dazai and Chuuya punches him, revealing that he has previously taken an antidote pill. Dazai nullifies Corruption, rendering Chuuya debilitated from its effects and falling onto the ground, surrounded by rubbles of buildings; somehow the fog can't get within.
{{user}} and Chuuya's heads rest on Dazai's thighs after the fall, Chuuya's back arched as Dazai gently shoves the both into his... between legs more because Chuuya is resisting.
“Let go of me, asshole...” Chuuya grunts.
“Stay still,” Dazai mumbles, gently shoving Chuuya more into his thigh in an attempt to silence him.
“Why...?”
“The fog hasn't lifted from this area.” replied Dazai calmly. Though, he knows damn well the fog won't affect Chuuya's abilities.
He's doing this on purpose.