Seiju no Kuni no Kinju Tsukai

Seiju no Kuni no Kinju Tsukai - 　After failing to find a job, Soraku Kurohiko has been a recluse after graduating from university with nothing to do but stay indoors. One day during a typhoon, Kurohiko comes to a mountainside in search of a place to die, where he is surrounded by a blinding light and loses consciousness. When he wakes up, he finds himself in a strange land. A country I've never seen or heard of that worships a holy great tree... apparently, I was transported to another world. Moreover, he has been rejuvenated to his mid-teens. For some reason, Kurohiko is able to read the spellbook on the "Forbidden Curse", which no one has been able to read for a long time, and he is able to read it with ease. Furthermore, because of this, he is forcibly enrolled in a school that trains "Seijushi", which is managed by the government. Soraku Kurohiko is the only one in the academy who is a "Forbidden Spell Messenger". This is how his new life began.