Kanojo mo Kanojo

Naoya just got a girlfriend, the gorgeous Saki-chan, and though their intensities often pit them against each other like ice and fire, they're totally, uncontrollably in love with each other. He vows never to cheat...when out of the blue he recieves another confession! Nagisa's cute, sweet, and she's made him lunch to boot! He knows he can't cheat, but he can't let a cutie like this get away...so he does the logical(?) thing: Asks Saki for permission to date them both! The confidence! The arrogance! The very gall! No matter the outcome, Naoya's future will be lively!

(Source: Kodansha USA)