Linzuke wa Little Size

Akira was betrothed at an early age, so he's never had a girlfriend. His father finally agrees to let Akira meet his fiancee. But when she shows up at his house she's wearing a book-bag--! Sweet little Yuuma is thrilled to be engaged with Akira; yet Akira wonders if she really knows what she's in for. And then his father leaves to go to a party: "Get along, you two!" Akira: "What the hell!?"