Fudanshi Joushi: Isaki-san to no Fushigi na Koi

Isaki, my boss here, is known as an elite because of his excellence, but he's so intimidating that he doesn't have a good reputation with everyone (even though he's not angry...). I was one of those people who was intimidated by Isaki... but then something happened that changed my perception of him. One day, Isaki found out about my side job as a BL doujinshi writer! This is bad... I'll get in trouble...! But Isaki's reaction was unexpected...!? The secret office love story between a BL writer and a rotten boy boss begins ♥

(Source: Square Enix, translated)