A 16-page-long original work by satousatotototo published in the 47th volume of Microne Magazine presented by I-Raf-you in the Autumn of 2017.
The main character of the story is a salaryman with the appearance of a child who has sexual encounters with several different women over the course of a day. In conformity with the theme of the magazine it was published in, all of the women who engage in sexual activities with the main character are much larger than he is.
The comic can also be found on e-hentai.org at the following address: https://e-hentai.org/g/1134395/87210462bc/