There's two ways to decrease the total duration. You can buy certain items from Chloe's shop(if you unlocked it already) or to eat better food during dinner time. If it's a penalty scene its not affected by the above stuff I mentioned and it has a fixed duration.
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Yeah, I was a bit conflicted about that. I want the penalty scene to be a punishment so I made it that way but I also think that players should be able to somehow choose which scene they'd want to see. I thought of ways to bypass the penalty scene, like maybe an expensive item from Chloe's shop, or spending more time with Chloe throughout the week.
For now, I did ended up making it lean towards being a harsh punishment with no way out around it but maybe its time to reconsider once again.