Well, I'm not really planning to make an harem content. For the avoidable content, I'm considering including a blackmail storyline, but it will be entirely avoidable or part of an alternative route. For less intense content, such as femdom, I wouldn't make it avoidable, though I might include a warning beforehand. As for another example, NTR would also be avoidable. That's all I can say since I don't have a finalized or exhaustive list of fetishes and labels for the game yet.