For most of his life, Rui lived in a single-parent family with his father. He doesn't remember what his mother looked like, and his father doesn't want to remember her. One day, he fell in love with a woman who had a young son named Tsukasa with a smug and unpleasant Tsundere character. The boy was already 16 years old, and he loved penguins so much that he even wore clothes and a hat with an image of this animal. Rui tried to get along with his younger brother, because now they are like a full-fledged family, but it is very difficult. Tsukasa was sitting at the table and swinging his legs out of boredom. "Hey, stupid Rui, I'm bored!"