This part is after Millennium Siege/Arc "One day, a curse fell upon Sensei. To the students, 'Sensei' became an enemy, and he lost everything overnight. But Sensei does not resent the students."

Continuation of where Succubus_Mari left the translation. "One day, a curse fell upon Sensei. To the students, 'Sensei' became an enemy, and he lost everything overnight. But Sensei does not resent the students."