ホワイトデー - Wikipedia
質問なるほドリ：ホワイトデー、起源は？　砂糖の純白など諸説　約４０年の歴史＝回答・梅田啓祐 - 毎日新聞

Did you know this custom is only in Japan?

Do you think men enjoy this custom?

What is the most expensive gift you got or gave on 'White day'?

Do you like 'White day'?