There are two flavors of the "Adult Petit Sweets Series": the bitter and rich cacao-flavored "baked chocolate cake" and the "baked cheesecake" with plenty of cream cheese kneaded into it. Each contains 7 pieces, and the estimated price is around 120 yen.
On the other hand, the "Adult Petit Cheese Okaki Series" comes in two flavors: "Cheddar Cheese Flavor" with the flavor of soy sauce and cheese, and "Smoked & Pepper Flavor" with smoked cheese-style cream sandwiched between them. Each contains 12 pieces, and the estimated price is around 100 yen.