The son and friend, Koshin, are in the final stretch of their exams. Reiko kindly encourages and supports both of them. Koshin has a crush on Reiko like this, and one day he asks her to go on a date if he passes his exams. Reiko happily accepts because she is pleased to be seen as a woman. Then, Reiko secretly goes on a date with Koshin after he passes his exams, and even develops a physical relationship with him. However, having experienced the pleasure of a young man's member, Reiko finds herself unable to refuse Koshin's advances…
