@Cynic and
@Saam It ends with the both of them still in college and Yugami denying that she is his friend even though they are functionally still friends. It also has Yugami say that he wants to continue to evolve and see things together with her. That is how it ends.
They are still together. That's what still means. It doesn't end with one of them dying. It doesn't end with them cutting off all ties with each other. It doesn't end with them hating each other.
I don't know what you think I meant, but I'm telling you what I meant by my comment. I was not wrong. This doujinshi shows them still together. It shows them in a romantic relationship, but that is not what I meant. Don't assume things if you don't even bother asking.