An unemployed youth unexpectedly unlocks a dad system. A childhood sweetheart whom he has not seen for many years visits with his biological daughter. While attentively accompanying the little dumpling to grow up, unlocking various skills such as cooking, painting, and foreign languages, and reaping a stable life through writing creation, he also gets along honestly with his childhood sweetheart, joining hands to build a warm little home. The daily life is full of soft warmth accompanied by parent-child, and ordinary days everywhere hide healing and gentle little beauties.