The interactions between Percival and Danaus with their basically opposite nature is exquisite, but also touching the sinister side of Percival with great elucidation to their intertwined fate. So, it's not to surprising that the endings are so contrast to each other (but my gosh.... that "sad" one is depressing :'( ). The art style is also complementing the tone of this shortl encouter.
Hope for your further work ^^