Reborn!: You're the One Who's Airheaded

She had no idea why, but she transmigrated.

She had no idea why again, but somehow she ended up in the family.

Then, still with no idea why, she moved into his house.

And, still not knowing why, she fell for him.

At last, when she finally figured out why, she still somehow wound up marrying him.

A friendly warning: This story might get a little out of character, so read at your own risk! Updates are irregular. The author is about to go on vacation, so after that there should be daily updates!