’tis the season for some special annual Kit Kats. These aren’t Kit Kat flavor, but rather Kit Kat packaging made special for this time of year.
On Valentines Day in Japan, girls give chocolates to boys. Girls are supposed to give chocolate to the boy they like(本命チョコ), but women are also expected to give chocolate to their co-workers(義理チョコ), and chocolate is also given to friends(友チョコ). About one month later, on White Day, boys reciprocate. White Day was actually a holiday invented by a Japanese marshmallow company to cash in on the same kind of moneymaking that happens during Valentines day, but now people give all kinds of candy and chocolates and even other gifts for White Day.

The delicately lemon flavored Valentines Day special Kit Kats. You and that special person each get half of these special Kit Kats.
With this Valentine’s day package, you’re supposed to open it and take one for yourself, then write a message in the box and close it up again, with the other Kit Kat inside to give to your special someone.

The front of the Kit Kat package for the students taking their entrance exams, on which you are meant to write a message such as がんばれ!応援している!(Good luck! I'm rooting for you!)
The way Kit Kats is pronounced in Japanese (キットカッツ) sounds like ‘I’ll surely win!’ (きっと勝つ!)[If Kit Kat is not plural, it is pronounced differently (キットカット)] For this reason, Kit Kats have become a popular gift for students taking entrance examinations(受験) for Junior High, High School or University. That’s why they introduced these Kit Kat boxes designed to mail to students taking entrance exams. They call it Kit Mail (キットメール). It has a spot on the front for writing a message to the student, something to encourage them.And room on the other side to address it. It also says on the box, “surely, the cherry blossoms will bloom(きっと、サクラ、サクよ).” I guess that idea being that just as surely as spring will come, signaled by the cherry blossoms, the recipient will pass their entrance exams.

The back of the box for the students taking entrance exams (受験生), on which you write the address.