Saw a comment from Oldnigth 5 months ago
And found out that there's actually a scene about an internship with Ste when you take a nap with him, where you must wake him up so that he can scold his son.
But I haven't encounter it through the past playthroughs so I want to ask other players whether they had seen it or not.
He also said there's a possible theory about Ste's 3rd Heart, but I have completely no idea....