Your game has memory leak issues, please fix this asap.
My CPU and GPU may be outdated, but they can run most NSFW games just fine. After exactly (I timed it) 5 minutes of gameplay, the game starts to get an intrinsic delay for the continuation of dialogue. Using the Menu itself doesn't give any lag or delay, it runs smoothly, and if I wait for a couple seconds before clicking enter for new dialogue, the game loads the next sentence smoothly as well. When I restart the game, it runs perfectly fine for 5 minutes once again. As mentioned before, it is EXACTLY 5 minutes.
This suggests a memory leak issue that can't be solved on my side and instead is a bug that needs your attention.