What kind of title is this?: Manga.
How many volumes are there?: 16 volumes are listed.
How many chapters are there?: 144 chapters are listed.
Where can I read it?: Reading links are listed for Kodansha USA, Pixiv Comic, Official Site, K MANGA. Check availability in your region.

Synopsis

About Girlfriend, Girlfriend

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)

Comedy Ecchi Romance Slice of Life