Recently, Sumire has been going through tough times due to her husband's erectile dysfunction. She tries to cope by exercising, but she can't help feeling frustrated. One day, while spying on her daughter-in-law, she notices Shunya masturbating to something he shouldn't be watching. Intrigued by his massive dick, she becomes obsessed with helping him release it. As a result, she offers to assist him in ejaculating at all hours of the day, regardless of their relationship or circumstances. Despite being constantly teased and fucked senseless by his stepmother, Shunya finds himself unable to resist... *Distribution methods may vary depending on the recording contents.*