Satoru has the best friend in the world, a young man named Sylvester. Satoru and Sylvester were very close friends and did many reckless and fun things. They were two delinquent young men.

One day, when Satoru went to Sylvester's house and knocked on the door, a very beautiful girl with long white hair and emerald green eyes opened the door

"Who are you?" The girl said in a very angelic and beautiful tone of voice