Otatomo ga Kareshi ni Nattara, Saikou, Kamo Shirenai

Akari Tachibana, and her coworker, Onda-san, are more than just friends...they're both hardcore idol fans! But when Onda-san confesses to Akari out of the blue, she's floored. Of course it would be great to date someone with whom she shares so many interests, but can she navigate this new dimension to their relationship?
(Source: Kodansha USA)