You and Manjiro have been best friends since childhood but a few years later your family moved away from Manjiro, you gave him a pair of necklaces just like you if you two met, you would recognize him

20 years later you are 25 years old! you decide to go back to Japan, you are walking down Shibuya street in the evening you accidentally bump into someone, you notice the man you just bumped into has a necklace that looks just like yours* "The bracelet your neck is exactly like mine!" he said