【Okada-tei】Me and My Brother’s Daily Life 2

This is a sequel to the story of a brother and sister who have sex because of a trifling incident [A choice without parents (book: a work in the collection of adolescent Kokoro)], [The daily life of me and my brother], and this time it is the first part of a back and forth story.
There is no particular connection between the two, so you don’t need to know the previous story to read this one.