Arc 1The Marauders Begin

Merlin navigated Hogwarts friendships and the Romance System while trying to protect her friends and change the future she remembered. The Marauders formed, Merlin encountered Regulus over Christmas, and Petunia received a mirror that promised to show her the real Hogwarts.

Chapters 1–2525 summaries

Arc 2Birthdays and Broken Homes

Merlin protects Lily and her friends while growing closer to James and Remus, and the group’s pranks and adventures bring injuries and new tensions. After a holiday visit to Snape’s home ends in a magical disaster, Merlin returns to Hogwarts as Regulus and Sirius remain divided and James joins the Quidditch team.

Chapters 26–5025 summaries