[MASSIVE SPOILER WARNING]
Rem is a demon maid girl from Re:Zero who at episode 17 makes one of the best, deepest, most heart-wrenching confessions of love in anime history to the whiny, good-for-nothing, responsibility-denying and friend-abandoning asshole of a main protagonist, and the protagonist immediately tells her to her face that he prefers a girl with whom he has spent what amounts to a few hours of time. Most of that time was spent embarrassing her in front of her peers, lying to her, breaking promises he made with her and getting her killed (twice). And Rem still continues to support him.
ARGH, I HATE SUBARU SO MUCH.