Samatarou, a seemingly ordinary high school student, harbors a divine secret – he is the offspring of a god and a goddess, with his sisters poised to ascend as goddesses. To immerse him in human ways and foster his growth, they dwell among mortals. Tasked with safeguarding Samatarou is Tenko, an angel who shares his birthdate and has been a lifelong companion. However, the arrival of transfer student Kumiko disrupts the tranquility. As Samatarou develops feelings for Kumiko, he faces a dilemma: woo her without resorting to his godly abilities, setting the stage for unforeseen challenges.