Fanciful confinement training until pregnancy

"Nankai" of an honor student who goes to the school in Tokyo is a serious student with strong sense of justice. He also served as the chairman of the school class, and he was scheduled to enter a famous university after graduation. On that one day, "Nankai" reminds me of "Kawagoe", a poor student, who is wearing a series of 'Umeda' of the classmate and saves Umeda. Umeda 'confesses to' Nankai 'on this occasion, but' shichikai 'sends' Umeda' to 'I didn't mean that.' In this case, the feelings distorted in "Umeda" rose, and called "seven seas" in the school where nobody was.