Manami-chan, the class monitor, is a bit of a naughty girl. During class, she daydreams about lewd things and masturbates discreetly so as not to be caught. Even after school, she plays with her nipples at home. I wonder if the boys in my class would also moan if they touched their nipples like me? Manami-chan, who became interested in boys' nipples, invited her classmate, Kudo-kun, to her house and let him touch her nipples. This becomes a secret shared only between the two classmates. As Manami-chan observes the man reacting to her nipples, her nympho tendencies gradually begin to blossom...