He came with sunshine, but disappeared into the fog. It is he who fills youth with sorrow and brightness, bravery and persistence, nostalgia and forgetfulness, a relationship destined to be fruitless, an experience destined to be entangled despite knowing the outcome. Who opened our tender hearts, and who built our shells as hard as iron. This may be an ordinary story, recording youth and growth, but it may also stir up little ripples in our hearts, the warmth that has been hidden for a long time.