I can't call you a stepmother... ~The body of my stepmother and son who are soaked with lust~

Nozomi is married to a man who is far from the age of 2017, but is upset when she finds out that her stepchild is her old girlfriend, Atsushi. Although they had no physical relationships, they were in love with each other at one point. Naturally, we continue to live together in awkward ways... However, one day, when her husband is alone on a business trip, Nozomi is moved by Atsushi's passionate feelings, who has revealed her true feelings for the first time, and ends up surrendering herself. Nozomi is troubled by her relationship with Atsushi, and although she feels guilty about her love for her husband, she seeks her body again...