Granddaughter Tsubomi returns to her grandfather's countryside home with her father. The grandfather, overjoyed by the reunion with his adorable granddaughter, attempts to give her a piggyback ride after several years but ends up collapsing due to back pain. Feeling responsible, Tsubomi offers to stay and take care of him. Through caregiving, Tsubomi begins to develop an interest in the male body. Innocently touching her grandfather's penis causes him to involuntarily become aroused... The two unwittingly step into a forbidden world.＃班長P
