Soichiro is a young designer working in a small clothing store and dreams of becoming a famous fashion designer and his clothes look worldwide. One day, Soichiro going to buy clothes. On their way through the park is very special fabric hanging from a tree. The tunic becomes a child. The little boy says his name is Yui and has come to Earth from the kingdom of heaven by mistake. Soichiro will take him to his workshop with the hope of using it for his new design.

Translated from Enterbrain: Kyun comes to my heart! A 15-year-old boy seemed to be born in love with his neighbor, Kay. Haven't done anything too cool, Kay also falls in love ... or something. Having always liked the boy, the dating they did in high school led to sensual love, and they were happy. Their romance was like the cheerful sun. Kay's personality is pure fire and clumsy, Kyun just comes to my heart! Includes a bonus comic titled, "Treasure of Daddy-Long-Legs".