This is the Marauder's last year at Hogwarts.
A few days before the start of school, Sirius accidentally discovered that his younger brother Regulus, who had become a Death Eater, appeared in front of a mysterious cave. But at this time, he had been away from No. 12 Grimmauld Place for a full year. Facing his brother who he had been with day and night, he once again chose to ignore Regulus's wandering eyes and the doubts about the whole matter, just like he had ignored his grief when he left home.
After returning to school, Sirius gradually began to worry: Regulus became a loner, stopped talking to anyone, and sometimes even disappeared for a month or two. He was always worried every time he met... But refused to say anything. In order to find out what was going on, the Marauders took action again, and they sneaked into the Slytherin lounge...
--
Note:
1. At the beginning of the creation, I wanted Sirius to know that his younger brother is a brave man. I tried to use the original text as the main text, but inevitably, the timeline had to be adjusted.
2. Campus life that will include a large number of predators.
3. At this time, Snape was still a Death Eater, so the core of the character was still evil.
Intention: Courage
