Rizelmine

Rizelmine (2002) is a animation, sci-fi & fantasy, comedy with 2 seasons, rated 6.6/10.

Iwaki Tomonori is a schoolboy who happens to have a crush on his teacher, but learns she has become engaged. Brokenhearted, he soon meets a girl named Rizel, a biochemically engineered human, who he learns the Japanese government has married him to against his will.