For now, I plan to include Harem, NTR (optional), and Foot Fetishism. Mainly, I will focus on the audience's requests.
I would sincerely advise against making NTR content lol. That would put too much on your dish, and steer NTR-avoider like me clean away from the game, while may or may not meet the expectation of NTR-enthusiast (as far as I know, they are EXTREMELY picky and won't support unless it has a compelling story or rub their specific spot).