Stepbrothers

Shirabu's parents divorced when he was nine years old, and his father got a new girlfriend around the time he started at Shiratorizawa. He'd been ignoring his father because he'd been nagging for him to meet his new girlfriend but he couldn't see what Shirabu could at home his mother was drinking her problems away which made him avoid her too, it was lonely but it felt better than looking after his mother because she was upset that his father that his father could move on. Shirabu finally agreed to meet his father's girlfriend and her son, that's when he saw his new stepbrother.