Exemplary student Bae Sugu lives alone with his father, the vice principal of his school. Weighed down by his father’s expectations, Sugu has to hide his one true passion: swimsuits. He does not know where it comes from, but his passion is pure and genuine – and often misunderstood.
But one day, when Sugu is secretly taking pictures of swimsuits by the pool, he is caught by his homeroom teacher who forces him into something ridiculous: join an all girls water polo team. Could this be the event that allows Sugu to express himself?