Mysterious Girlfriend X Vol 4

From the Vertical edition

Doppelgangers and Drool The popular idol Momoka continues her mission to live the life of a normal high school girl by thrusting Urabe into the spotlight, which culminates in a moment of truth for Urabe and Tsubaki. But will Tsubaki be tempted away when the sloe-eyed beauty Suwano makes a play for his affection?

Source: Penguin Random House API