Female teacher immoral school fornication

Nana, an English teacher at a certain school, has a secret she cannot tell her students... That is the presence of her husband, Shota, who is 12 years younger than her. The two originally knew each other through their parents. Two years ago... Shota went to the United States and was separated from Nana, but he achieved great success as an entrepreneur. After that, Shota returns to Japan, marries Nana, and then transfers to the school where Nana works... However, Shota has trouble adjusting to Japanese school. Nana doesn't know how to distance herself from Shota...