Yumi has recently been troubled. Her son, now entering puberty, has become obsessed with masturbating every single day. Used tissues litter his room, and the sharp, musky pheromones lingering in the air begin to stir something deep within Yumi. Unable to resist her pent-up desires any longer, she suddenly lunges at her son's cock and starts sucking him wildly. Though initially shocked and confused, her son quickly becomes fully aroused by his mother's intense erotic energy. This mother and son, reuniting physically after so long, passionately crave each other again and again, loving and climaxing together endlessly until they're completely spent.