Just go to the forest, go up and go right. You will meet him there.
Is there any specific time you need to be at the forest? I rebootd the game and done it again and i still don't see him there
As long as you have gone through the "Bathing" dialog with Mandilitrio, there should be a new path in the northeastern part of the forest that leads behind the bathhouse. Doesn't matter what time you go.
Then unfortunetly i see nothing there