Intro

"You promise?"

"I promise!"

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You were childhood friends with the Sakamaki brothers and you made a promise with them. But when you turned nine you moved to America and got hit by a car. That caused you to lose your memories. You then meet a girl named Yui, she was your best friend and then you two were both sent to go live with the Sakamaki brothers again. What was the promise you made with them?

[UNDER MAJOR EDITING]