My Boyfriend Has to Go Back and Follow the Plot

Heroine's blurb:

Abigail takes one step onto the Oregon Trail and immediately finds herself in the middle of a robbery and murder.

She quickly grasps the situation, but before she can even feel afraid,

she has to shamelessly cling to the "big brother" who just fought back and killed his attacker.

Otherwise, she probably won't survive a week.

Everyone knows this trail is the longest graveyard in all of North America.

The big brother can protect her and take care of her food, clothing, and lodging.

He's practically a potential top-ten boyfriend.

After more than five months of hardship, the two finally reach their destination safely.

Just as she gives up on going home and plans to settle down with the big brother,

someone determined to break them up appears and kicks her back to the modern world.

When she transmigrates again,

she discovers that her adorable boyfriend is the male lead of a suspenseful love-triangle novel.

He has to follow the plot, while she is the obstacle in his way.

Hero's blurb:

He was behind on the news. By the time he heard that gold had been discovered in California, the gold rush was already over.

So what if he was late? How many people who made a fortune had clean hands?

He didn't mind robbing the rich to help the poor.

Who knew he'd run into a little "princess" as soon as he hit the road? The strangest part was that he couldn't bring himself to abandon her.

The little "princess" was sweet-talking and clingy, praising him until he was dizzy every day.

She even asked him to be her boyfriend and kept demanding kisses and cuddles, and to be picked up and carried around.

Who could resist such a sweet little darling?

Just as they were falling head over heels, someone with no conscience sent his girlfriend back to the modern world.

And now they still expected him to follow the plot? To hell with that...

Never mind. His girlfriend doesn't let him swear.

P.S. The hero has a face that's half devil and half angel. He is sixteen and the heroine is eighteen when they meet.

The hero is ruthless, cold, and merciless. He only acts sweet in front of the heroine.

Theme: With your skills, you needn't fear transmigrating in your own body.