(Crossover) Son, Son, I'm Your Dad

Just as the orphanage was about to close, the director, a man, suddenly took in several children with hair of different colors.

As long as he takes good care of these kids, the orphanage can stay open. For the male director, it could hardly be better.

And so, the director and his poor, helpless, tiny (not really) charges begin a chaotic life together. Yep, that's about it.