Found! / Brian and teenage Gus are out running while there's a ~gas explosion in B/J's building?

[sakesushimaki.livejournal.com]

Helloes! I'm searching for a post-513 fic, which, as I am quite certain, is a oneshot. I think Brian and Gus are training for a marathon? And I'm not sure, but I believe the fic is set in New York, with Brian and Justin living there and Gus visiting (for the summer?). Father and son head out for a run early in the morning and when they come back, their building is on fire, the cause having been a gas explosion or something similar. Justin is believed to have been in the apartment at that time, but I think/hope he wasn't, after all.

For some reason I was sure that it was one of severina's fics, but since the raid on her journal left me without result, I must've been on the wrong track.

Help? :)

Edit: Found!