Miku who lost her husband and works at an earpick beauty treatment salon to raise her son with just one woman. One day, Miku, who was proposed to Takekawa, a regular customer, is worried about Kazuya who was hikikomori and consults with the hikikomori center. And Miku who entered Kazuya's room after receiving advice there found an AV of mother and child incest in the room. Miku knows Kazuya's feelings and makes a mistake with her son only once, but that leads to an irreversible tragedy ...
