After graduating from high school, he took advantage of his excellent appearance and worked as a depaga, but Sekai, who is jealous of women, changed jobs to the construction industry because of Mendo. This seemed to suit her well, and since then she has been working on site. You might think that she has a temperament of an old man, but she is actually an old-fashioned older sister who is embarrassed by vulgar language. The content is also changed from bullying a M man with big breasts to healing older sister's breast play. She is a big-hearted onee-chan who accepts all of the bad M-boys with her "size of vessel" and "depth of bosom" cultivated because she was a yancha in the past. "Grandfather and SEX" is the climax of this work. 'Motherhood' is just that.