My son is about to leave home for a job. Yui was happy that her son, who was raised by her single hand, had grown up splendidly, but she felt lonely. My child, who has taken care of me, goes out of reach... On the last night they spend together, Yui can't control her emotions and sneaks into her son's futon. Her son felt the same way. Two people drowning in forbidden love crossing an unforgivable line. However, her son's sex was much more intense than her expectation of Yui, and it was unequaled. Yui will eventually fall into a frenzy world with a continuous piston that does not end no matter how many times she is.
