Daisuke Ichijou goes on vacation to his grandmother's beach resort during Spring Break. As he arrives, he admires the beautiful beach and all the beautiful ladies on it, whom he finds himself quite inexplicably popular with. After the beach, he heads straight to Toriton, a maid café on the beach where his cousin Maya and her clumsy friend Momona work at. As soon as he enters, he is greeted by his cute younger cousin's smile Onii-chan?! I haven't seen you in awhile! Welcome!