Harry Potter: Missed Chances

First life, after Lost transmigrates: Lost: Severus, I'll always be by your side. Just call my name, and I'll sacrifice everything for you... Severus: Get lost! Draco: He... left... Harry: Your life belongs to Lost! You bastard! Second life, after the two are reborn: Seeing Lily unconscious... Lost: Ah, Severus really only loves Lily. Seeing Harry get picked on... Lost: Mm, as expected, it's all because of that old love rival. Researching a purification potion... Lost: Lily really is important, after all. Discovering Severus's courtship... Lost: I'm already helping you... There's no need to seduce me or anything. Severus: ...What will it take for you to believe me? Everyone: You play with fire, you get burned!