The second season of Kanojo mo Kanojo. 
 
After their hot springs trip, Naoya continues his relationships with both Saki and Nagisa. Bringing along Milika (who kissed Naoya) and Shino (who secretly has romantic feelings for Naoya), they embark on a summer vacation full of romance with a fireworks festival, camping, and Okinawa. 
 
Milika's younger sister Risa also appears, making the romance in this neo-standard rom-com heat up even more. A season two filled with summer and swimsuits is about to begin! 
 
(Source: Crunchyroll)

Episode 1 - Even If That Isn't the Right Way

Episode 2 - How Nagisa Feels

Episode 3 - A Place for Three

Episode 4 - Girlfriend and Girlfriend

Episode 5 - A Third One!?

Episode 6 - Tsun Is Dere

Episode 7 - The Girlfriends' Challenge

Episode 8 - Obviously in Love

Episode 9 - The Tsun's Dere Gets Outed

Episode 10 - Can't Wait for the Hot Springs

Episode 11 - Hot Spring Tropes

Episode 12 - Girlfriend, Girlfriend

SynergySP

Mainichi Broadcasting System

Kodansha

NBCUniversal Entertainment Japan

Nittele Wands

Nikkatsu

Girlfriend, Girlfriend Season 2