Summary
Next door neighbors are the Hanabishi and Hidaka families. The dads from both sets of kids’ homes are quite close, thus the whole family gets along swimmingly. Kouki, the lone son of the Hidaka family, was brought up by the four Hanabishi sisters with the same amount of care and affection as any other sibling. They were getting ready for a long business vacation abroad when the Hanabishi and Hidaka parents met up one day. Leaving his four daughters in Japan was the only thing stopping Kantaro Hanabishi from going on the trip.