The Orange Chocolate Mocha features steamed milk and espresso mixed with mocha syrup and Valencia orange syrup topped with orange whipped cream, orange peel, and orange sugar (that's a lot of orange there).
The Frappuccino version includes the same toppings but blends milk, coffee, and ice with the requisite syrups instead.
The inspiration for the dish are chocolate-covered, candied orange slices.
Prices start at 420 yen (~$3.53 US) for a Short Orange Chocolate Mocha and 520 yen (~$4.37 US) for a Tall Orange Chocolate Mocha Frappuccino. Both drinks are available through February 14, 2015 (which is probably the same day they'll start with a Valentine's Day-themed drink).