Shimotsuki-san wa Mob ga Suki: Hitomishiri na Kanojo wa Ore ni dake Dere Amai

After school, Kotaro Nakayama returns to the classroom to pick up something, and he finds Shiho Shimotsuki asleep in the empty room. Shiho is rumored to be the favorite of Ryoma Ryuzaki, a boy popular with all the girls, even though she always seems expressionless and no one has ever seen her smile.