Taking Over the Villainess’ Body: 365 Days Left to Live?

28/4/2022: Title changed to better reflect the story as I've gotten comments that the previous title didn't seem to fit and misled people about the story.

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Ann, a corporate slave in the modern life, suddenly couldn’t resist her body’s drowsiness and fell asleep after working non-stop for... who-knows-how-long. Her sleep wasn’t a good one as she was overly worried she wouldn’t be able to finish her work. When she finally woke up, she was greatly shocked.

An unknown room, an unknown man with his icy expression, and moreover, the man addressed her as “Arlea”, and not “Ann”.
And then she finally realized. She somehow ended up in the body of “Arlea”—a villainess in the fantasy/romance otome game she had played in the past, when she still had free time to relax. To make things worse, she remembered that in the next one year, she—Arlea—was fated to die.

‘In such a situation, what should I do?’
‘Let’s think seriously of a way to overturn the situation?’
‘But hold on, what if I can’t change the scenario? Why bother?’

Having lived her days in the modern life as a serious and restrained woman who became a corporate slave to her death, Ann finally decided... to spend her additional 365 days to live well, and to cross out some of her bucket list that she could still do!

'If I can avoid my death, it's good. If not, at least I've enjoyed my additional time here in this fantasy world where magic and monsters exist, where I don't need to slave away my life ridiculously for the corporate!'

Little did she know that her decision would cause everyone who knew Arlea to be very surprised and alarmed with her change.
What happened to the villainous, hateful woman called Arlea? Why did she become like this? What is she scheming now??
Let's see how long she can keep up her pretense!

Can she avoid her death flag, or will she be able to survive more than the designed 365 days?