Thanks you for liking my game enough to stick around for the hidden endings. (That's right, there's more than one. ;) ) When you arrive at the True love end, put your pink glasses ON, choose the option of chatting with Seb because you'll indeed won't be allowed to advance any further, then take the pink glasses OFF again. It'll take you to the hidden story from there. The big X will be there to prevent you from changing the censorship after you reached the route split, but until then you can change it. The problem you might experience is that this X unfortunately doesn't reset between loading files. You can resolve this by starting a new game (and hold in Ctrl to auto-skip) or go to the question of whether to Hype with Sebastian and scroll back two texts.
Hopefully you'll find it this time. Another thing we unfortunately couldn't change properly is that the main menu will not change right away, the main menu theme will be different only if you were to start the program again or got one ending rather than right away. Do start a new game though for all the last content!