Im Not Popular GN Vol 10

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 male plumbing!