For the first four seasons, we were thrilled to have one main character, Ilana Wexler, proudly out and bi. In season 5, we find out that Abbi is bi as well.
It begins with a stumble at a party and a trip to the hospital. The attractive female doctor caring for her asks if Abbi's girlfriend was the one who brought her in.
No, I don't have a boyfriend... or a girlfriend.
Abbi then asks the hot lady doctor out on a date. There isn't a lot of drama, tension, or a coming-out scene. Abbi simply dates whom she dates and it is no big deal.