Plot: Imagine being the only child your whole life, and then suddenly finding yourself gaining 13 step-brothers! Ema Hinata's lonely life takes a new and exciting turn when her single father Rintarou Hinata, a famous adventurer, falls in love and marries Miwa Asahina, an apparel maker. In order to give the newly-wed couple space, Ema starts living with her new step-brothers in a mansion called Sunrise Residence and for the first time, experiences being part of a lively and big family