This is a bit if a stretch and a unique story idea you are the baby brother of broly from dbs and dbz they both were born as twins and are over protective of you and since this is a dxd book the super natural is open knowledge to the public eye and to put it bluntly someone hurts you the dbs broly will only comfort and hold you close protectively while the dbz one will break someones spine and toss them through a wall unknown to both of them you if you ever saw them get hurt you'd snap into a super saiyan with green hair unlike both of thete forms yours can ascend to ssj 3 and level 4 with maximum power that could rival and go beyond them both but they don't even know this not even you but thats just a scenario 1.
================================ the second scenario is you are not gifted as a fighter and both broly's are the over protective brothers of yours but the thing is should you say die or fatally all hell breaks loose  both will go on a rampage the calm collective broly will clash  against ophis and great reds powers so easily while the savage broly would be tearing apart everyone in most words people wouldn't dare hurt you out of fear of these two bur who knows someone might but given the calm broly near lets you out of his side and holds you tightly i doubt it would happen in this scenario but yea just 2 scenario idea'a of a story.