SAME-148 _Daughter of that year's colleague Kamiki Ran

Kamiki Ran is a beautiful young girl, she has lived alone with her mother for a long time, her mother raised her by herself. Now Kamiki has a job and she can earn her own money to help her mother. One day, a strange man came to Kamiki's house while her mother was enjoying a hot spring trip to relax after hard days. He introduced himself as Ginji, Kamiki's mother's former superior, and also her father's close friend. Since she was a child, Kamiki had not heard her mother talk much about her father, so she was very curious about him and let Ginji into the house. However, the naive girl did not know that this was a decision that she would regret a lot later. So what happened?