Eternal Labyrinth

The main story in this tankoubon takes up half of the book. 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. I believe Misaki's father is a university professor or a scientist. There is some chemistry between Eiji and Misaki right away, and before you know it, Eiji announces his intention to marry her. They get married after she graduates from high school, but their romance does not last for long. Eiji begins actin...