This series is a spin-off of the drama "Unintentional Love Story", focusing on the captivating student years of Hotae and Donghee. Hotae and Donghee grew up together like brothers. After Hotae's father passed away, he moved to Seoul, but a few years later, he returned to Gangneung to live with his mother for certain reasons. Reuniting after a long time apart, the two begin living under the same roof, restarting their lives together. Donghee, facing Hotae, both his best friend and first love, tries to suppress the emotions stirring within him but struggles to do so. Hotae also develops unprecedented feelings for Donghee, whom he hasn't seen in years. Their delicate relationship quietly shifts, driven by an unexpected incident....