Rule 34 Dev - 6+boys 6+girls bag chair classroom curtains desk hand_on_own_cheek hand_on_own_face indoors lecture long_hair looking_afar monochrome multiple_boys multiple_girls nakatani plaid_clothes plaid_skirt plaid_vest school school_bag school_chair school_desk school_uniform short_hair sitting skirt spot_color teacher teacher_and_student touhou usami_sumireko vest window|6772429521