The magic academy decides to go on a beach vacation? Even the queen is coming? How could the lecherous Saito and the others let such a great opportunity slip by. However, upon arriving at the beach, Saito learns that the swimsuits in Louise's world are so conservative. At this point, the headmaster begins their plan with the lie of "water spirits," first making them wear standard swimsuits (though not bikinis, they still show off their figures well). Then come the bikinis, and finally, they have them start a beach volleyball tournament. In teams of two, the winning team gets to wear witch attire. But in reality, that witch attire is actually a bikini made of seashells (extremely revealing). What will Louise and the others do?