The older sister breastfeeds her baby too openly and the younger brother is a teenager

When a woman gives birth, the man sends his wife back to her parents' home to take care of her, and the end result is that he grows a pair of horns and a … another child. Taku is a second department student. He stayed at his parents' house and lived a free student life. Because she had just given birth to her second child, her sister returned to her parents' home to gently raise her, but her father-in-law was missing! While drinking together, she deliberately teased him by challenging him to drink her milk. But unexpectedly Taku agreed, unable to take back his word, his sister gave him milk to drink. Taku continuously used his hands to stimulate his sister's nipples before sucking, causing her sister's milk to flow out. In order to take revenge on Taku, his "milk sucking" sister, Taku quickly attracted his half-sister's charm and produced "milk". But how can you conclude that here? He pushes his half-sister to pull it, and despite her constant protests, she continues to entertain him with messy strokes. And this is where their fake relationship begins.