The Chocolate Pretzel Mocha takes a standard mocha (chocolate syrup, steamed milk, and espresso) and tops it off with whipped cream, crushed chocolate almond chips and pretzels, and a drizzle of chocolate syrup.
The Frappuccino is most the same but blended with ice and with the addition of one whole pretzel for decoration.
The price tag on the Chocolate Pretzel Mocha starts at 430 yen (~$4.09 US) for a Tall, while the Chocolate Pretzel Frappuccino starts at 490 yen (~$4.66 US) for a Tall.
If you're wondering why pretzels for Valentine's Day, the idea is that pretzels are somewhat heart-shaped.