Renai X Royale - Love's a Battle

I, transfer student Hanamaru Mari, love you, Komachi Hiro-kun! Please go out with me! Our protag, Komachi Hirotaka. Every day, he goes through the motions-- dodging his cunning underclassman's advances, accidentally hitting on the student council president, and chasing idols.
But one day, he gets a sudden confession! With that one declaration, she sparks a blaze of conflict around the protagonist, thawing his long-frozen heart. How could you cast me aside and get all lovey-dovey, flirty-dirty with some random woman~!? Do I mean nothing to you now!? Senpai... Renna will listen to anything you say, okay? There can only be one reason why Nii-san won't love me: those harpies swarming around him. Right? Unbeknownst to the protagonist, sparks fly as the girls engage in a battle royale over his engagement. All is fair in love and war, doubly so in a love war! But who will the goddess of victory smile upon in the end? There can only be one!