Story about the other sons brother http://www.mangago.zone/recommend-manga/monster_master...

I mean this one dang it
http://www.mangago.zone/read-manga/monster_master/

I get it, so sena and chikage is the 3rd and the 4th son.
The father chihiro
1st son chitose (yukito)
2nd son chidori
3rd and 4th son twin (sena{kaname} and chikage)
5th son chisato(shunsuke)
The grandson love boy to.
Amazing