@Ooferdoofer@MerchantMarx I have read all the way to the end of the first volume (cause y'know I'm the one translating the raws) and
the closest we get is the final chapter, where there is something you could technically call romance. But honestly, it looks and feels more like sibling love. In fact I feel there is more romance with Satsuki despite her being too chicken to progress with Ao.
@Thrembs: Nah, no incest here. It's just the scanlator being a joker. The siblings just act like they hate each other but are actually close. Plus I wouldn't look too deeply into what the dad says. He's comic relief and nothing he says is meant to be taken seriously. No disrespect, but you're just looking too deeply into this. The only actual love interest is the classmate and (maybe) the dickhead co-worker. DEFINITELY not each other.
@TwilightFaze@Thrembs my thoughts exactly. In one of the chapters I even mentioned I am a SatsukixAo shipper, I'm just taking the innuendos a bit far is all. Their dynamic is much better as siblings and nothing more.