Do you still remember everything we did when we were young? Do you still remember the girl you chased in your youth? Remember those good friends in school who always joked with you? The heroine and the hero liked each other in their sophomore year of high school, but later they separated because of the heroine. Unexpectedly, they met each other this time a few years later. How will the two people finally face each other? Please look forward to Lulu's "Youth"!