Tsubaki, who was separated from her son for a reason, Kenta, an employee of the inn who came alone on a hot spring trip, was Tsubaki's son who was separated from her life, and Kenta who suddenly couldn't open her heart even if she met Tsubaki again, resented Tsubaki, who didn't do something motherly, and urged her to give her body. - Tsubaki who lets her son have sex, but as she piles up her body, Kenta Tsubaki who learns that her mother really thinks about her also has more passions for Shinji than parents and children, and greedily seeks each other ...