Hyunsun, after leading an exceptionally ordinary life, embraces the milestone of turning 40āan age often viewed as the threshold of wisdom, where one is expected to stop drifting and start making meaningful choices. Wishing to start something new before itās too late, he enrolls in guitar school. There, he encounters the young instructor, Yeoreum (T/N: āSummerā in Korean), and for the first time, he feels a stirring passion for life. Their connection deepens, igniting a sense of purpose he thought heād lost. But of course, the world is always full of unexpected turns. As Yeoruem starts to show Hyunsun his wholesome and charming affection, their relationship faces a new situationā¦