No Matter How I Look at It, It's You Guys' Fault I'm Not Popular!, Volume 10 - Nico Tanigawa

Tomoko's caught in a love triangle...and she doesn't even know it yet First-year Akari is head-over-heels for Tomoko's kid brother, Tomoki. But thanks to Komi's meddling, Akari thinks she and Tomoko are rivals in love When the three girls finally get together, the confrontation quickly devolves...into a heated debate about d*cks