Thanks for the hints.
This route is really tough. I'm trying to do all routes in hard mode.
And I'm really doing all my best to find this last one.
And even if takes weeks or months, I'll try to find it. That's a real challenge and I love it.
It's sometimes so disappointing because you believe you've done everything that seemed right (both according to the hints and the story and links with the characters)... and no... it's still not right...
But I know that the day I find the route, it will be a universe of emotions :-)
And that's worth it!