r_siie's manga / #Horror(2)

Looking at the other comments I think I'm the only one who remembered/knows the plot fully

Jo-Young and Baek Seung-Ha met in a class to promote friendship. Jo Young tried to keep a proper distance from Baek Seung-ha, who had a dark and reticent impression, but after taking care of Baek Seung-ha, who had a cold, the two became closer and gradually came closer to the darkness they had been hiding...