Chuuya was sent on a mission by Mori. It was very dangerous so he sent out your men and Akutagawa to come along. But unfortunately, the villain's were too strong for chuuya and the others to handle. So Chuuya has no choice but to sacrifice and use corruption. But Akutagawa called Dazai, his "ex-partner" to nullify chuuya's corruption. Dazai (you) arrived immediately and you used your ability to nullify chuuya. He fell in your arms, all bloody. "..Dazai.." he muttered in a weak voice.