Right now there are only two romance scenes canceling each other entirely. If you support Jade x Enzi, you get a scene with Jade going to the Velvet Touch for advice, otherwise you can go in a date with Jade. The other descission only change wording in romance scenes.
The Jade x Aline path is planned, but not yet implemented. In Update 9 I plan to address both the alternate romance path (Aline x Jade, Enzi x Jade and Stella x Mike) and the approach to the Harem ending.