6. The little brother musn't be allowed to stay up past his bedtime.
7. The Big brother is never allowed to hurt or harm the little brother in any way.
8. The big brother must tell the little brother they love them, so they won't even forget the big brother is always there for them.
9. The big brother must believe in both big brotherism and little brotherism.
10. Spending time together is really important to remain the bond.
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The Big Brother Rulebook
FanficNorway's rules of being a good big brother [namjoon cover for the sake of it]