Roommate Asami - Okusama wa Joshikousei [D-Collection] Japan

Roommate Asami - Okusama wa Joshikousei: Asami Onohara is in most ways an average high-school girl; cheerful, outgoing, and just a bit clumsy. She has a secret, though: she's married to her physics teacher! Apart from her parents, nobody but the two of them know, and if they want to stay together, it needs to stay that way until she graduates.