Oshi Koi Capriccio

Mitsu Himekawa, a second-year high school student, secretly loves BL with her best friend Rui Mashima, and spends her days fantasizing about her male classmates. One day, one of her observation targets, Shou Kagomiya, tells her, “Mitsu, you like Rui Majima, don't you?” and Mitsuha is shocked.

A chaotic love triangle (?) woven by a BL-loving girl (gal) and a yuri-loving guy (handsome)!

(Source: Kadokawa, translated)