The first time Misaki met Eiji Niresaki, she was 17 years old, and he was visiting her father as part of some sort of study group. There is some chemistry between Eiji and Misaki right away, and they get married after she graduates from high school, but their romance does not last for long. Eiji begins acting strange, and after only a few months, he leaves Misaki. What is going on with Eiji? It looks like he is involved with some serious things that Misaki has no idea about, things that are keeping him away from her. Meanwhile, Misaki is alone and pregnant...