I have never known love, but now I need this man's permission if I want to marry someone!?

Mary Jane, a nurse in London, received bad news. Her grandfather, her only living relative, had had a heart attack. She rushed over to her grandfather on his deathbed when he introduced her to Fabian, a surgeon. He was worried about his granddaughter's future, so he chose him as her guardian and entrusted him with everything. Mary Jane, who was already independent as a nurse, had doubts about her guardian. I'm only 22 years old, why do I need a guardian? Fabian may look good, but he's so overwhelmingly intimidating.