White day originated in Rome in the third century. On February 14, the Roman emperor saved a pair of lovers who were supposed to be executed for violating the prohibition of love and marriage. The Roman emperor set up Valentine's Day to commemorate this day.

And on March 14, a month later, the rescued lovers swore that their relationship would never die. To commemorate this day, it was named white day.

In addition, it is also a Valentine's Day related to Japanese folklore. February 14th was originally a day when girls appealed to boys for affection, and girls gave gifts to boys.

But in the end, it is no longer the same, and it doesn't matter who gives gifts on Valentine's Day now.

In Japan, if one party receives a lover's gift from the opposite sex on February 14th to express love and has the same affection or affection for the other party, it will return a lover's gift to the other party on March 14th, indicating that they have been soul mates this year.