One-shot. 'I don't know when I started loving Lily Evans. Maybe when she became my friend. Perhaps when I first saw her. Or maybe, I fell in love when she left me and I realized how much I needed her.' Snape looks back on his time with Lily.
Zero works for the greater good. He always considers the consequences of his actions before he kidnaps nine people and forces them to participate in a dangerous experiment in order to save the world. He's not evil. Right? 999/VLR spoilers.