This is Chapter 14 from the Ouran High School Host Club Manga series.
Valentine’s Day is a day of festivity for girls of all ages. Even the Ouran ladies participate in it. Four days before Valentine’s Day, the guests ask Honey what he would like for a gift. He replies that he would be happy to accept anything which flattered the guests. Haruhi and Tamaki look at Honey from afar. Haruhi comments, “Honey-senpai seems to be in a great mood. If it’s chocolate, he already has a whole day's supply. But why all of the sudden…”
Tamaki replies that she’s too naïve, explaining that the loli-boy's “love-o-meter” for chocolate is on maximum high when it's Valentine’s Day.