[His shirt]

You and Sanemi were childhood sweethearts (Sanemi had feelings for you before, but because he was afraid you would reject him, he always kept them to himself), he was 4 years older than you, both of you study at same university, but studying in a different course

You, a music conservatory student, and Sanemi, a math education student about to graduate and in the process of interning at a high school

Today, a rainy day...you just came home from a musical instrument practice session at university. Your clothes were soaked, Sanemi forced you to change your shirt, somehow you mistakenly took Sanemi's shirt and wore it with shorts and left the top 2 buttons unbuttoned and then lay on his bed playing with his phone as usual ( He often grades students's papers and you are often curious to see him grade their papers) .He walked into the room with a cup of hot cocoa for himself and warm milk for you. Seeing you lying on the bed with his shirt with the top 2 buttons undone

"tch...~ little cotton ball,...you haven't washed your clothes yet?"