Coward ~ L.S.

A 16 year-old Louis Tomlinson is impregnated by his boyfriend, 17 year-old Harry Styles, who abandons him upon finding out.

or

After being abandoned by his boyfriend at 16, Louis Tomlinson learns how to stand on his own two feet and support his newborn daughter as a single father.
Ten years later, Louis and his daughter are forced to move to Los Angeles for Louis' job.

After abandoning his pregnant boyfriend at 17, Harry Styles runs away to LA where he is scouted by Simon Cowell and placed into a new boy band called One Direction.
Ten years later, he is a highly successful solo artist on a sold out stadium tour. During a signing event, he is looking down at the table when a record of his is slid under his nose. By the time he looks up to greet the fan, their back is already turned and they are walking away. He starts to get up to give them their signed record, but a single piece of paper slips out from between the gatefold. It only says one word.
Coward.