Hello and thank you for your interest. ^_^
No, the loveless route is not included as part of Guillaume's route. I think it will be different enough to require a whole route of its own, so it will be worked on at a later date. Since I have yet to start properly planning the loveless route, I don't know currently what the relationships will be, but Frederique will definitely feature.
I'm glad to hear you liked the first game - Leopold's route will be worked on after Guillaume's, so not long to wait now.
Many thanks for playing