Saburou Fushigimi knew there would be no chance to repair their broken family.
Once he was taken away to the Playground at an early age due to his powerful Measurement, the opportunities the rest of the family had to visit him were few and far between.
His parents were also aware that the relationship between their son and his other two siblings was unordinary, and could never be ordinary.
That's why they hid his existence.
To save the kids from the seed of internal conflict and heartache that had been sowed before it had the chance to sprout.
One day, however, contrary to their wishes, the secret had slipped; somehow, a young Atsuko had stumbled upon the truth and discovered the existence of a second brother.
After that, there was only one member of the family left clueless about it all.