Hi there,
Turns out it was a bug preventing finding those two from triggering. I'm so sorry about that.
I've just updated itch with a fixed verison of the game (V06)
On my website here: https://sites.google.com/view/bondagebunnygames/game-guides/love-lock/sebastian
You can find the how to on getting those endings.
Thank you for asking about this here, or I doubt I would of found this bug.
Have a lovely day