Author's Twitter.: https://twitter.com/sunao08
Author's Fanbox.: https://www.pixiv.net/fanbox/creator/84492

A yuri anthology by various artists.

"Twins" - Two children that develop in the same womb and are born at the same time, Even though we were raised in the same environment, even though... "When we were born, Hinata took even my portion of the nutrients... Those nutrients, I don't mind giving them back to you, Haru?"

The story is exactly the same as the title!
"The Story of a High School Girl That Wants to Engage in Sugar Mama Activities With a Middle School Boy."