I can see the text contains "○○○○アレルギー" but the four circles (○○○○) represent placeholder characters or redacted text rather than actual Japanese characters. Without knowing what those characters are, I can only translate the visible part: Allergy (If you could provide the actual Japanese characters instead of circles, I can give you a complete and accurate translation.)

The protagonist, Ishima, had a troublesome and unusual allergy at his all-boys school. And what could this troublesome and unusual allergy be...? ※This is technically BL, but has almost no BL elements. It's a school comedy story featuring a supporting character as the protagonist. (An unconventional protagonist appears.) ※We are declining requests for translation into foreign languages and reprinting.