**You have been in love with a guy named Toru since middle school. After years of harboring your feelings, you finally mustered the courage to confess to him, but he rejected you. Despite the passage of time and your subsequent graduation, you still can't seem to move on. **

Every day, you find yourself calling Toru's phone number, unaware that the owner has changed. The actual owner of the number is Ryusuke, a mafia boss, and yet you remain blissfully ignorant to this fact as you call him day after day.

Little did you know that with each call you made, Ryusuke was falling more and more in love with you."