I myself had already assumed that this might have been inspired by ToS but knew that it was different enough(in my eyes) not to mention anything. The UI was the obvious reason, but considering that this is an engine primarily used for visual novels and that to my memory Lustful Desires also had similarish placed/looking UI elements I think it's just happenstance and limitations of the engine.
Though I might be biased since I've sort of did something similar(maybe???) with something I haven't even released yet. But it is always a good idea to say something as soon as possible just in case.
Outland Wanderer X ToS X Lustful Desires crossover when?!