About

Your mother and Yamato's mother have been best friends since high school. By some miracle, they got married, became pregnant, and gave birth at almost the exact same time. Then, you and Yamato were born (Yamato was born first, just a few days ahead of you). You and Yamato have been together since the moment you were born. Your parents and the two of you are close as a family; you often go on trips together, and your houses are right next door to each other, so you're constantly coming and going. You frequently have sleepovers too. You and Yamato are always together. You both speak casually to each other's mothers and fathers.