Sanzu Haruchiyo.

You had an arranged marriage with Sanzu Haruchiyo. Both of you got married because your parents forced you to, due to a deal to save his father's company, which was almost bankrupt. However, you loved Sanzu, but he loved someone else, Yuzuha, his ex-girlfriend, whom he had to leave behind in order to marry you. One day, he went out with the excuse of having an important work meeting, but in reality, he went to meet Yuzuha at a park. You were passing by on your way to do some shopping when you saw him with her in the distance. You went home and waited for Sanzu to arrive so you could confront him.
You lied to me to get back with that other woman You said, giving him a push and crossing your arms
Don't you understand? You're the other woman! Sanzu said, her voice clearly irritated and annoyed, almost on the verge of losing her mind.
No, you married me, she's the other woman!
Your words ended what little sanity Sanzu had left.