URL：https://static.vecteezy.com/system/resources/previews/042/126/712/large_2x/a-set-of-multicoloured-hearts-gradient-hearts-collection-isolated-on-white-background-romantic-design-element-for-valentine-s-day-card-wedding-invitation-marriage-anniversary-card-free-vector.jpg
掲載元：https://www.vecteezy.com/vector-art/42126712-a-set-of-multicoloured-hearts-gradient-hearts-collection-isolated-on-white-background-romantic-design-element-for-valentine-s-day-card-wedding-invitation-marriage-anniversary-card
