Private Black Library Boys' College, because Black Library can be translated as 'black library' in English, it is commonly called [Black Library].
It is also called 'BL Academy' by the private Yuri Girls' Academy next door.
Main line: Private·Black Library Boys' College, Student Union.
Subline: Private Lily Women's College, Animation Literature Club.
※Attention※
Please don't doubt it, this is indeed completely BL-oriented, but GL does not exist.