Seiju no Kuni no Kinjutsukai

Kurohiko Sagara, feeling disillusioned, is engulfed by a sudden bright light and loses consciousness. Upon waking, he discovers he has been transported to a new world featuring a massive tree. He also finds that he can effortlessly decipher "forbidden spells," texts that others have been unable to read. As a result of this unusual ability, he is accepted into an academy that trains "Sacred Tree Knights."