Introduction
"I'm going to the United States for treatment."
"Hmm"
"Ryoma-don't forget me!" The girl said with a playful wink.
"Definitely not!" The boy said firmly
"Hook"
Two children's voices sounded
"Hang yourself with a hook - no changes can be made for a hundred years and you must keep your word"
"To be fair, if you fall in love with someone else, I will let you taste the power of my ninth-degree black belt."
"Then if you don't play tennis with me, you're going to kiss me in public!"
"You..." The girl blushed
In the cherry blossom forest, the breeze blows and the flowers fall. The scene is frozen.