Fairy Tail: I'm the Great King Gray Wolf

Snow transmigrates.

He has no System, no golden finger, and only fragments of memories from two cartoons in his head: Fairy Tail and Pleasant Goat and Big Big Wolf. The first tells him this is a world of magic. The second gives him a strange instinct: whenever he is knocked down, he always comes back from the nearest shadow. The price is that each time he “comes back,” he forgets something. He forgets Natsu's name, forgets which version of his blueprints he was working on, and almost forgets who Mirajane is: the guild's fiercest silver-haired witch, who speaks sharply to him every day but is the first to bring out bandages when he gets hurt.

“My name is Mirajane. Remember.” She slaps a note down in front of him, pressing so hard that the strokes show through on the back of the paper.

Snow folds the note and puts it in his pocket. From then on, he touches it once every day. He draws blueprints by the guild's back door, hauls crates at the docks to train his legs, and gets battered and bruised before learning how to push magic out from his chest. Not to fight, but to make a bowl of strawberry ice every morning, with half the honey and a third of the fruit left in. He builds his shaved-ice machine up to its twelfth version, while she eats strawberry ice all summer long.

Later, someone asks him why he works so hard.

Snow grins, revealing a chipped canine tooth. “Because there's someone whose name I promised I would never forget.”