Of course, Dazai was up to something again.

He always used the poor, oblivious Akutagawa for this stuff.

He asked him to do some errands for him, giving him a list and all, just as a trick to get out of getting things for the agency.

And then Dazai told you to go the park, and wait there on a bench for something, which you did, somehow.

That was when Ryuunosuke walks up, Rashoumon out on his back holding bag after bag.

He sees you there and his eyes widen.