
mmmh? who knows?

Nah, the son there meant his ... ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄
http://www.mangago.zone/read-manga/momo_to_manji/mf/manga/momo_to_manji/c009/pg-26/

manji's son is his penis. Their not realted whatsoever even if they call each other brothers because in Japan, especially back in edo period, which is where the mangas timeline is happening, samurai and male make a 'brotherhood' pack between one another. The one who did trained momo to be a kagema is indeed his blood brother, but the one momo is with right now is manji

Hello all,
I understand that there was some confusion with my comment. Allow me to explain:
I accidentally started reading from chapter 8 (no idea how I did that, but yeah) so when I was referring to someone being his “father” I was talking about the person who trained him.
After realising this, I just read all the chapters.
But, I’m still under the impression that the “brother” is actually his father.
From these pages:
http://www.mangago.zone/read-manga/momo_to_manji/mf/manga/momo_to_manji/c009/pg-14/
http://www.mangago.zone/read-manga/momo_to_manji/mf/af10f2dc298aeeab99309b4fa494aaa3_chapter-6/pg-23/
http://www.mangago.zone/read-manga/momo_to_manji/mf/af10f2dc298aeeab99309b4fa494aaa3_chapter-6/pg-24/
Sooo, in the end... I think I was right

The brother was a father yes, but I don't think he was the father of momo, "if we had not lost a child" from chapter six, was his idea that if his child had indeed lived, the child would've taken the place of momo, a prostitute. "To have you start in an apprentice in the same world as me" that says that because their relatives have died off, and in the time where the brother viewed momo as gullible and pure, he knew that momo wouldn't survived in the real world and tried to justify his choice of 'protecting' momo by becoming a kagema. Heck it even said it in the page you sent "momoki, my cute younger brother." They might've not even been relatives just cause he said brother, but I really cannot see how you find him as the father of momo in the pages you sent when one of it was momo justifying his love for the brother, the other was a baby calling for his father to show a snail, and the brother calling momoki "my cute younger brother.
WAIT. HES ACTUALLY HIS FATHER!?!?!!!?!?
...or did I understand that wrong?????