Tragic Love

When Yuki was a child, he made the mistake of inviting outside children (children who aren't of the Sohma family and don't know of the secret curse) into the yard to play. While playing Yuki accidentally bumped in a little girl and transformed in the rat, in front of the outside children. So, Hatori was called to erase the memories of Yuki's friends. Yuki had pleaded with Hatori not do it, but Hatori was under orders and did as he told. "You're cold." sneered Akito, "You're cold like snow."
So, it was then that Hatori's heart became frozen, like the snow. Besides Shigure and Ayame, he kept his heart closed to all. Until a woman named Kana showed up in his office one day. She was to be his new intern, she explained with a huge smile and cheery attitude. Yet, Hatori didn't pay any attention. Kana headed for the window of his office and gasped, "Ahh! It's snowing! I knew it would snow today!"
She then turned to Hatori and asked, "When the snow melts, what does it become?" Hatori annoyed, thinking that she was making fun of him, answered "It becomes water." Kana buzzed, "Nope! It becomes Spring!" And from that point on, Hatori and Kana became close friends. Hatori could feel his frozen heart began to melt, little by little. It was just a matter of time before they embraced.
Hatori turned into a seahorse (Dragon) the first time Kana and him hugged. It is the curse of the Sohma family. Kana panicked, trying to figure out what to do. "Water?!" she gasped, "Or is it seawater?! Which one?! Hatori!" She threw Hatori in a hot bathtub and he changed back. "You know," teased Hatori, "If you did that to a real seahorse, you would have killed it." They laughed. Kana said that she now understood why Hatori never hugged her, because he was afraid. That he no longer had to be, because she loved him and accepted him, curse and all. Hatori wept, finally the ice around his heart was melting away. He was free to be happy with Kana.
So one day, he and Kana went before the head of the family, Akito, to ask for his blessings for their marriage. Akito became angry, smashing a glass bowl against Hatori's left eye, and damaging it. He was never going to let Kana have Hatori, never! Hatori lay bleeding on the floor, holding his eye, as Shigure rushed in to hold Akito back. Akito pointed towards Kana, screaming that if Hatori loses his eyesight it's all her fault! Kana fell into deep despair. She blamed herself for Hatori's injuries. Hatori tried to assure her that wasn't her fault, but nothing he said or did could reach her.
Kana became a shell of herself, ever suffering. It was then that Akito suggested that Hatori should erase her memories. He said it would be the best thing to do, a testament of Hatori's love for Kana. So, Hatori asked Kana if she would like her memory erased and she said yes. As Hatori held her hand, she said that her greatest regret wasn't knowing Hatori, but that it was she couldn't stop him from getting hurt. With tears, Hatori erased her memory.
The next day, a cheery Kana bows to Hatori. "Thank you. I'm sorry it didn't work out. But with the things I've learned from you, I'm sure I'll become a great doctor someday." Kana left and Hatori cried. She later became engaged to someone else and got married. Although Hatori is content that Kana is now happy in her life, he still misses her from time to time.