[Poncocchan] Get-Along App Ch.4 (Yarashii Kibun ni Naru Appli Ane to Ore to Imouto to)

Miku storms through the rain swearing she feels nothing for her idiot brother and can pretend the get-along app never happened, but an awkward run-in leaves her sulking on her knees, cheeks puffed in protest as she swallows his big penis down her throat as 'punishment.' One thing leads to another and the busty girl ends up pinned beneath him, insisting he's 'not my big brother' even as she takes him deep toward a messy nakadashi finish. The gut-punch arrives on the final page, where her tearful confession reveals the love was there long before the app ever entered the picture.