peter wakes remus up

[catpaws]

There is a scene rattling around in my brain in which Remus gets a terrible migraine pre-transformation and Sirius tells him it's okay to go lie down in the dormitory for the rest of the day. Remus does this gladly, feeling very sensitive to both light and noise; the other boys make sure not to be too rambunctious. However, later in the day, Peter accidentally sets off an alarm-like gadget lying by his bed which makes a terrible shrill sound that keeps getting louder and louder throughout their dormitory, ultimately waking Remus up and making his headache even worse. Sirius gets really angry at Peter and chews him out thoroughly.

I can't remember which fic this scene comes from! At first I thought it might be in escribo's These Four Kings because it features a similarly protective Sirius, but I couldn't find it there.

Can anybody help?