Antagonist's Dilemma: Unbidden Netori

For some very strange reasons, I seem to be enjoying the NTR genre, but that was in a game.

I was never proud of it, but it had a strange kick to it, but like I said, that was in a game.

Although I despise the antagonists for constantly stealing the MC's harem, what frustrates me even more is the MC's own insecurity, hesitance, and fear of being misunderstood.

If you bitch out on every situation, you're practically inviting someone else to steal your girl.

But there are some antagonists who cross the line-like kidnapping or forcing others against their will. Even though I still engage with the game, I'm not fond of characters like that.

Tragically, those games led to my demise, and now I've transmigrated into the very character I despise.

But that doesn't mean I'm going down the NTR route. I'm going to focus on my studies and build a successful life with a loving wife and kids.
...

Why does this stupid system keep pushing me towards a harem? I don't want that at all. I'm determined to live a normal life at all costs.

(Disclaimer: this story is not netorare, Eric will not get cheated on, and is made from the hate generated from typical weak willed harem manga protagonist)