The wild and carefree life of Earth, a mischievous 8th-year university student, is about to reach its final chapter. In what should be his last semester before graduation, instead of focusing on his studies, he pours all his energy into winning the heart of Sai Mai, a junior student. However, his efforts are constantly overshadowed by the irresistible charm of Tae, the university’s heartthrob. Determined to confess his love to Sai Mai on Monday, April 1, 2024, Earth carefully plans the perfect moment. But after a wild graduation party, everything takes an unexpected turn—he wakes up only to find himself stuck in Monday, April 1, again and again. Realizing his strange predicament, Earth seizes the opportunity to indulge himself to the fullest and do whatever it takes to win Sai Mai’s heart.