Akira can't stop masturbating with his mother Yurika's underwear. Yurika, a perverted mother who was excited by this, further soaks the panties with scent and induces her son's masturbation. Yurika, who couldn't stop her own masturbation and was thinking of doing something even more lewd, finds a recruitment for a certain project. That project is "A Room You Can't Leave Until You Cum 10 Times" by the AV maker Dassu! Yurika, who can't suppress her desire for her son, secretly applies to participate without telling Akira...
