Rule34.GG

Regular 3boys
abs
arms behind back
bar censor
bara
black hair
bottomless
brown hair
censored
chalkboard
desk
flaccid
foreskin
gakuran
glasses
highres
looking at another
male
male only
measuring
multiple boys
multiple males
muscles
nikuo (29niku)
open clothes
original
paper
pencil
penis
penis measuring
rectangular eyewear
red-framed eyewear
school
school uniform
semi-rimless eyewear
sideburns
sweatdrop
thumbtack
uncircumcised
under-rim eyewear
yaoi