Hmm But I think it is worth the read for Ayana x Miho and Ayana x Ai. And although there is not a happy end; but both the love interest of the main girl are girls - Miho and Ai. And if Ayana truly cared for someone it was Miho and Miho did too as evident from the recent chapter.
And it is not just them but there is one more pair and Mari's friends also just wanted to protect her and remained with her till the end! And that gyaru pair in first half was straight out yuri.
So I think there is enough of subtext in there to worth the read.