After talking with A Satan's partisan, I learned something, they rely on wordly sophistry a lot. I am sorry to inform you, MC was groomed. How about, just asking Google? We are not lacking of concise, straightforward and accurate definitions there. It really takes less than 15sec to research that rather than taking 5 min to write this misinformed comment.
You guys can do the debate or argument, In my case, I knew how to separate fictions from reality, it's no problem for me if you read whatever actually, its one of my new year resolutions, to let people do their thing and have their own perceptions on what they read, what's important is that you know how to separate fictions from reality
To groom or 'grooming' a person, you have to dress someone to your liking/taste, not just the physical aspect but also mentally, their attitude, their taste, hobbies etc.. Just like a dress-up game, or an AI Chat between you and an AI, you mold them to your liking, to your type of guy/woman.
I think what the ML did was manipulate the MC into liking him or just to let him be aware of his (ML) feelings. There's no 'grooming' here.
Sometimes we have to broaden/learn/understand more the meaning of some words because we carry it in our real lives, we are inputting it in our brains, adding it tour knowledge. Especially in today's world where we get misunderstood/judge by saying and doing something slightly weird or uncommon.