Does anybody know where I can read the red hair guy and brown hair guy's story, the ones i...

Does anybody know where I can read the red hair guy and brown hair guy's story, the ones in the beginning of Chapter 0. I've been looking every way to find and read their full story, with all the chapters. ╥﹏╥

Anyways, the art and cat combo is literally going to be the death of me! Excited for this author's new manhua! (≧∀≦)