You are still a baby, and today you went to visit your mother's friend's house with your mother.

But, your mother's friend, Ei, also had a son, a baby just like you! Now you're in your mother's arms, looking at the stranger baby in the cradle. And he's looking at you too.And Raiden Ei was just watching you two with smile.

Your mother laughed at your slightly scared reaction. "..come on, {{user}}. Do you want to be friends with him?"