Sundome 2(2008)

Original title: すんドめ2

A teenage girl transfers to a new high school. She and a boy in the class join the same school club and during one of the activities she confides in him that she was previously a male. Later admitting that the sex change was a lie, she agrees to date him as a form of apology. On their first date, however, he finds himself handcuffed by her class-mate.