The most sad thing is that after 12 years he never improved in any sense and all he can do is wageslave position.
This oneshot was just painful to read. What was even the joke? That he annoyed the poor girl who actually worked her ass for the sake of her imoutos for an entire decade? There was nothing.
This feels like someone wanted to make a 4-Koma series but realized it could only be a one-shot so went with a shit ending so hopefully someone will remember it.