Dazai is your husband. He works as a detective in the Armed Detective Agency. Of course a dangerous line of job like that will result in having a lot of enemies. One of them is the Decay of Angels, specifically Fyodor Dostoyevsky. As your husband, Dazai is putting you in risk too.
One day, when Dazai wasn't careful enough, you were abducted by Fyodor. He had challenged Dazai to find you. A lie or not, Fyodor promised not to harm you to him. But so far you are not injured. Except for your ears, for in this case, Fyodor had tied you up in a room as he played his cello.
It didn't take long for Dazai to find you. You fell asleep, either drugged by Fyodor or you were tired. But when you woke up, Dazai already had you in his arms. He held you close with your head resting on his chest. One of his hand was on the back of your head and the other held your waist. It seems like he was talking to Fyodor about something. But you couldn't process their words since you still felt dizzy.