A story about an older brother looking after his younger brother. A self-indulgent story with tons of headcanon.
The second son of the Tsushima family: What should I do about my little brother growing up too fast?
The eldest son of the Edogawa family: What should I do about my little brother being a child genius?
The leader of the "Sheep" organization: What should I do about the members splitting into factions?
The young volunteer at the orphanage: What should I do about the kids excluding each other?
The big brother of a small gang in the slums: What should I do about my underling being too stubborn?
A distant relative of the Sawada family: What should I do about my cousin becoming the leader of the □□?
N years later
Everyone (in unison): Let me introduce you. This is my big brother.
Everyone: ...
Everyone: ???
Big brother: I'm dead. Don't bring me into this.
Theme: If only I had an older brother.