Rurin town revitalization ― I will give birth to a baby for measures against the declining birthrate―

The stage is "Kaminoko City", a depopulated regional city plagued by the declining birthrate and aging population and shutter street.
Rurin Mizuguro, a female student, was born and raised in Kaminoko City, and was an ordinary female student who worked hard to revitalize the town with the people of the shopping district for the city she loved.
One day, she is appointed as a "bubble princess who performs sexual service and pregnancy" of the "prolific promotion program" which is the last means of the country's "measures against the declining birthrate".
For the revival of the shopping street that was born and raised while confused, she fulfills her fate to perform sexual service to men every day ......

舞台は少子高齢化とシャッター通りに悩まされる過疎地方都市「カミノコ市」。
女子学生の水黒瑠凛はカミノコ市で生まれ育ち、大好きな街のために商店街の人々と町おこしを頑張る普通の女子学生だった。
ある日彼女は国の「少子化対策の最後の手段」である「多産化推進プログラム」の「性的奉仕と妊娠を行う泡沫姫」に任命されてしまう。
とまどいながらも生まれ育った商店街の再復興のために、彼女は日々男性への性的奉仕を行う彼女の運命は果たして……。