Responses
I'm pretty sure he's just a distant relative of his mom... It's just that they happen to maintain relations with the extended family and the mom probably knew Ayumi since he was a kid or something, but only because he's her cousin or something, not her brother.
Is Ayumi san a relative of his mother or her younger brother? They keep on saying Relative but what kind of relative? I did read kotaro saging that Ayumi is the younger brotger of a relative but in his profile he doesnt have any siblings tho? Im confused.
BTW loooove this manga! I have no idea why i prolonged reading this. Maybe the incest tag i saw hehe