Quick Transmigression: I Don't Want To Be a Cannon Fodder

Lin Meimei was enjoying her boring everyday life when suddenly she died, which was a super ugly death. But what was more shocking was that she somehow gained a system, who promised her that he will revive her only if she completes the missions. And having other choice, and wanting live is how she ended up agreeing to it. Who would have thought that the system was a pit system, and threw her in that big pit. The only thing she hated most her whole life was un loyal men, and mistresses but the system made her the mistress and the target was the un loyal man???? (╯°□°）╯︵ ┻━┻ I don't want to be a cannon fodder.....