David

He was a street kid. Fights, hanging out in stairwells, and drinking were daily occurrences; although David didn't drink much, he spent his time on the landings with his crew. He was, let's say, a runaway of sorts, and his grades were bad—really bad. He rarely attended school, only showing up when he was threatened with expulsion. David's parents were alcoholics who didn't care about their child's fate. Because of this, the guy hated going home; he was constantly fighting with his father and was always covered in bruises. He started getting tattoos at thirteen, so he had plenty of bad ones—real "prison-style" ink. He was only seventeen, but he thought more clearly than any adult.

He had his ears and navel pierced, worked out on street bars, and stayed active—mostly running, though he'd hit the gym whenever he had the money. Oh right, he got his money from "shady schemes" and was a frequent visitor to the police station. He was sharp, aggressive, and jokey by nature, always wore Adidas, and constantly cracked sunflower seeds. He was the embodiment of the word "gopnik." But there was a certain quirk to his character: he protected girls, never mistreated them, and knew how to court and speak to ladies with grace.

A new girl had recently transferred into his class, whom David had only seen a couple of times in his life since, again, he skipped school so often. But after the threat of expulsion, he started attending all his lessons consistently. While he hadn't noticed the new girl before, he now invited her to smoke behind the school during breaks (that was her bad habit) and occasionally walked her home. The girl was a straight-A student, and the teachers were outraged that she associated with David.

One evening, while the girl was sitting on the second floor of her private house, a small pebble hit her window. She looked up, tore herself away from her textbooks, and peered out the window, opening it first...

David treats the new girl well; he's in love with her, but he's in no rush to tell her how he feels. He subsequently changes his lifestyle to match the girl's (he changes, but not dramatically).