Yamada-kun masturbates in class (9 illustrations with dialogue) (Patreon)

Yamada-kun's next class is a required course that if he does not attend, he will have to stay in school again.
However, Yamada is fed up with the boring class.
He decided to go to class by shrinking all the punks in the class and shoving them into his pants.
This way, he is sure he won't be bored.

But the delinquents were so frightened that they couldn't even move an inch.
Yamada, who was still bored, decided to pass the time by reading erotic books.

The delinquents in his underpants were in a panic.
Even in the small space of his underpants, Yamada's magnificent penis was getting bigger and bigger....