Check out the opening of Kanojo mo Kanojo ( Girlfriend, Girlfriend! ). According to the official website, it arrived on TV in Japan on July 2nd.
Check it out:
Synopsis:
Naoya is a first year high school student. After he confesses to Saki , the girl he has loved for a long time , they decide to start dating and Naoya's life is full of happiness. However, one day, a beautiful young woman named Nagisa also confesses her love to Naoya.
Naoya and Nagisa immediately hit it off, and he tells Nagisa that he already has a girlfriend. But she vows to confess to him again, when he suddenly proposes that they go talk to Saki about him dating both of them at the same time. Saki and Nagisa hit it off immediately, and although Saki was angry and reluctant at first about the idea, she eventually agrees.
Finally, Kanojo mo Kanojo is directed by Satoshi Kuwabara ( Gotoubun no Hanayome ) at Tezuka Productions (Dagashi Kashi).