On the day after graduation... a three-year-long, secret relationship with a female teacher rekindles, culminating in a pure love kiss and intercourse. (Yoshitaka Nene FSDSS-238)

The forbidden love between a teacher and student was not only to be kept secret from others, but also on the condition that they could not have physical relations until graduation. After the graduation ceremony, their repressed love and lust erupted, and they continued to have intercourse...