[Demon Slayer] My Ex Is Back to One-Sidedly Drowning in Love and Hate

She was a young sword prodigy. Then she transmigrated.

In the chaotic Warring States period, she was a self-employed warrior, aka a wanderer. She could pick up odd jobs and earn some money, but a steady job was still better!

Luckily, a daimyo saw her talent and hired her to teach swordsmanship to his children.

But... why did the eldest son of this family frown, turn away, and start breathing heavily every time he saw her? Could it be...

Maki: You may be handsome, but teacher-student romance is a no-go. Don't get me fired!

Oh, okay. It turned out he was just so aware that he couldn't keep up with her talent that he had become obsessed with meritocracy, gotten caught up in the rat race, and started pushing himself too hard. He got anxious whenever he saw her! The frowning, turning away, and heavy breathing were all because she made him nervous.

All right, all right. So he wasn't in love with her and trying to start a teacher-student romance. At least her job was safe.

She really couldn't figure it out. I'm your teacher, so of course I'm better than you. What's eating you, handsome?

A tale of tragic love and bitter resentment. The heroine's strength is about equal to Yoriichi's, and greater than Kokushibo's.

The first-born brother redirects most of his jealousy toward his younger brother onto the heroine, but she is so thick-skinned that she doesn't take it seriously...

The heroine is entirely human, but has a reincarnation setup.

Premise: The sea of hatred can be filled, and the sky of love can be mended.