Onee-San Rental : Harem Group Crush(Story Experiment Short).

Shinji Shinjuku, shy and awkward heir to Celestial Star Visionary Entertainment, finds his life turned into a harem romcom when a group of female quintuplets come into his life as part of the Rental Sister control group, rented to spice up his life by his rich parents who are worried that he would be too shy to approach a girl and start a family with her if he stays on his current path, so in come the Hime sisters, Aoi, Paprika, Matcha, Jeanne and Kuroka.

The rental sister company "Onee-San Rental Industries" also starts to work closely together with "Celestial Star Visionary Entertainment" to work on the Quintuplets' dreams of becoming a J-Pop idol, model, actress, voice actress and dancer respectively as they believe the talents the girls possess and want to cultivate in their respective lives could bring the rental sister company extra eyes and extra applicants and clients in the future.

Shinji's brother Ishhin is very laid back and is one of the male J-Pop stars produced by their parents' company so he already has no plans to inherit the company so it's up to Shinji himself to take over the bussiness one day, now let's follow the home, school and bussiness lives of Shinji and the Hime quintuplets all living under the same roof.