Hey... Do You Know How Babies Are Made? -From Today We're Brothers-

“Hey, older brother. Do you know how to make a child?” Yuma grew up in a mother and child family. One day, when I returned from my part-time job, there was a man I didn't know. "Welcome back, my brother!" ? After hearing a lot, it seems that my mother and Koitsu's father will be remarried. So even if you say you're my brother from today, I can't follow you at all! Moreover, I pushed it down suddenly and said, "Tell me how to make a child with your body?" From that day, I will spend every day being swayed by my forcible younger brother ... Mom, I'm seriously going to like this guy!