Currently there are no exclusivities and you can "bang" all 3 Carnations in one playthrough. But you need to choose the right choices for this, because certain events and stats are needed for this.I was wondering. Can you bang (of course off stage) all 3 carnations in a single gameplay? Or are there mutual exclusivities?
Also some day we will have to make a choice who is becoming our special love interest. It was mentioned that there will be no harem endings, you have to chooose one girl. You might stay on friendly terms with several other possible LIs, but you have to choose one.