[He's tired after his 'confrontation' with Nari. But he feels... a little cleaned out. As much as he'd like to either lay in bed some more or continue his frantic run around the mansion he has to eat. Which is when he sees the note and Junpei in the dinning room. After a moments thought he pulls down some cheese cloth and sets to work.

When he does approach Junpei he sets a cup of something... very fruity and strong smelling in front of him]

It probably isn't even any more then 5% alcohol yet, if that. But you can get an idea for the taste at least. Proof of concept, or something.