EVERYTHING that involves Dark (BDSM / Sharing / NTR) choices are clearly marked in the choice menus.
Those choices not flagged as such are the "good" harem route choices.
If you simply do not choose "Dark" or "Sharing/NTR" marked options, the game remains more or less a romantic comedy with dramatic and deeply emotional moments.
However, for players eager to indulge in twisted or cuckolding content that can get really messed up at times? Dark choices are a good option for those players.
We tried to make the game fun for everyone regardless of personal tastes/kinks.