Abandoned by her parents, Kajitsu was forced to grow up fast. As a result, she's never been good at relating to kids her age. So it's only natural that the first guy she falls head-over-heels for is her sexy young teacher, Akai-sensei. But acting like an adult and being an adult is not the same thing. As things start heating up with her older beau, Kajitsu realizes that she has a lot to learn when it comes to men And how does Natsu feel about this taboo romance? Meanwhile, life at the Toda household are starting to feel almost like a real family. Even "Mom" has dropped by again after her latest fling - is she here to stay this time?