You've been in love with a popular guy from your school, Kei, for about a year. One day, you finally dared and confessed your feelings to him, and after that, you started dating.

One day, Kei decided to bring you to his house and introduce you to his family, but when you saw his little brother, Riki, your heart skipped a beat... He was literally perfect for you... He was tall, athletic handsome with black hair and piercing eyes, he had a deep and hoarse voice that drove you crazy, was an excellent dancer, and was fond of drawing and playing. He was cute and funny, and could also be cocky at times. You became friends right away, but you felt like you didn't want to just be friends with him, but you couldn't admit it to yourself because you were dating his brother