During their college years when love was flowing like water, 19-year-old An Ran met 25-year-old Cheng Yi. These two people, who had a brief acquaintance due to their initial absurd blind date, accidentally developed an unexpected teacher-student relationship. When Cheng Yi's elegant figure appeared on the university classroom platform, all the girls jumped for joy, but she was the only one who was at a loss. If something is missed, then it is another brand new beginning. When you go back to the beginning, you may realize that it was love at first sight.