Rule34.GG

Regular 1boy
1girls
blue eyes
blush
brown eyes
caught
caught in the act
class 3-z
covering mouth
female
fully clothed
gintama
hand over another's mouth
long hair
looking at viewer
looking back
low-tied long hair
male
mutsu (gintama)
official alternate costume
open shirt
restricted palette
sakamoto tatsuma
school uniform
serafuku
stealth
sunglasses
suriran
suspenders
sweatdrop
teacher
teacher and student
undone necktie