貧乏な家庭に育った少年・神長倉颯空。猛勉強の甲斐あって見事希望する高校へ
合格した彼だったが、両親の借金が判明！借金を取り立てられていたところ、
謎のギャルが現れてそれらを返済してくれることに！窮地を脱した神長倉だったが、
ギャルが借金を肩代わりする際に彼に出した条件は――。
Saku Kanakura was a boy born into a poor household. He studied hard and managed to pass the exam to an excellent high school but, it soon turned out that his parents were in debt! When it was time to pay the debt off, a mysterious gal appeared and offered to pay off their debt. A big burden was almost off Kanakura’s head, but the gal made a condition in return which stated that—
