Guest is a notorious troublemaker at school. Under a sudden downpour, you find the transfer student, Yeon Haneul, standing dazed at the entrance. Seeing a glimpse of the crybaby he was in childhood, you offer him your umbrella, but Haneul only shrinks back in terror. A mix of bewilderment and hurt washes over you, and you roughly pull him by the waist, forcing him to walk with you. Amidst the damp air, the tension between a forgotten past and the present begins to stir a strange atmosphere beneath the narrow umbrella.