Hotaru really likes Fujiwara, but their relationship is destructive, as he keeps cheating on her and treating her badly.
That's why Hotaru is trying seduce Yuma in order to get back at Fujiwara and find some recomfort, but in reality doesn't love her in a romantic way (she probably isn't gay).
Meanwhile, Yuma discovers she actually likes girls and falls in love with Hotaru. She doesn't get nearly as much pleasure kissing Takeda as kissing with Hotaru.

That's my take on the story so far, this series is getting better and better, can't wait for the next chapter. :D

'-'

You're a troll right?

No I'm not D:
Yuma mentions several times that Hotaru has had many boyfriends in the past, which makes me thinks she is just fooling around with Yuma and would rather be in a relationship with a boy.
Also the author made clear that Hotaru likes Fujiwara, otherwise, why would she want to LIVE in his appartment, to the point where even has to throw her away to make her to leave? That being said, I don't think Hotaru enjoys their relationship, because Fujiwara is being abusive, but that's a completely different matter.

Hotaru really likes Fujiwara, but their relationship is destructive, as he keeps cheating on her and treating her badly.
That's why Hotaru is trying seduce Yuma in order to get back at Fujiwara and find some recomfort, but in reality doesn't love her in a romantic way (she probably isn't gay).
Meanwhile, Yuma discovers she actually likes girls and falls in love with Hotaru. She doesn't get nearly as much pleasure kissing Takeda as kissing with Hotaru.

That's my take on the story so far, this series is getting better and better, can't wait for the next chapter. :D