Harry is quite like Lily. Deathly Hallows inspired. Post 5th Year. [Not your typical] eventual Snape & Harry guardianward fic.
After a failed attempt to shrink Percy's ego [there was a potion involved], The Weasley Twins find themselves accompanied by a reluctant third: 15 year old Severus Snape.
He wanted to be a decent godfather. He really did. Now he has a second chance.
Severus Snape suddenly finds his home populated by three Gryffindors and a Slytherin.