Unexpectedly, she gave her virginity to her beloved grandmother. (Izumi Kinue HONE-298)

Kinue dotes on her grandson, Junya. She secretly gives him pocket money or cleans his room. She always takes care of him wholeheartedly, willing to do anything for him. Until one day, Kinue notices Junya getting an erection while looking at her. Knowing everything about her grandson, Kinue immediately realizes he's still a virgin and decides to help him. She says to her adorable grandson, "Want Grandma to help you graduate (lose your virginity)?"