ok, so
i completed the game for the first time
i got the good end with Shiba
i unlocked something new? just to know
cause i dont want to do everything again just to try to get the best end
You can skip days by selecting your bed at night. If you want to get the best endings (and the cheats) make sure you spend a lot of time with the guys on weekdays and you should receive the choice that will decide if you get the bad ending or the best ending (it's usually pretty obvious which choice will lead to which ending). Hope this helps!