Chiba is a vampire who has lived for more than 100 years.
Sesshomaru was a dog demon who lived in the Warring States Period 500 years ago.
She wore a disguised smiley mask, and he was bone-chillingly cold.
An accidental time travel made the two people meet.
At that time, he was a little demon who had not yet learned how to transform; she was a little girl who shrank during time travel.
When they met again 500 years later, she smiled and said to him, "Hello, Sesshomaru."