I feel like she's scared being yuri because something happened in her past ?

I believe you are right. Good old trope losing friend because of yuri etc.

Next I wanna see iroha and izumi development

There is already a chapter about them, but there's still no translation :(

Can you give me the link to the chapter?

In the end, I only, well, only feel real real bad for Kiku only. Being stuck with these stupid sisters must be tough. And I never understand why most of the drama story I have read started with the lack of communication. I know it's for the sake of drama, I know your love is forbidden but for fk sack Sena, you were already willing to distance yourself from Yuuna, telling her the reason (even through letter or something) wouldn't cause any more damage. You feared of losing your sister, and now it's better when she is about to get married away? For real lol. Imagine if Kiku wasn't involved, Yuuna would still get married and have her sister stray farther away from her, while Sena would keep living in loneliness and regret. Honestly I'm more than fine with that.

So yeah, the only person I actually like in this story is Kiku. Just leave her away from this mess please. She deserves someone way better. Though of course the author won't do that lol. I'm afraid Sena may end up just like Sei from It's a Detached Relationship, never move on from loving Yuuna, but since she starts to also love Kiku, and since Kiku is just too good as a person, she can accept that.

And to think it's from the same author of the unicorn series.

I have catched up to the raws (they are scanslated in my language). And if I understand everything so far right,

It seems Yuuna also knows about Sena's feeling. She also said she loves her when they spent a night together. The problem is, it's unclear if their loves are the same. Maybe it's the same, but since she knows it's forbidden, and in order to be together, she wants to make her own family with Sena in it, she has to marry. And so hearing from Sena that she will feel lonely after Yuuna's marriage, she knows her thought is already in the wrong way. (Just my guess, her train of thought is unclear as of now. This also makes me wonder something. Is Yuuna bisexual? Does she also love her fiance? Or is he just a nice guy that she has no problem marry with? If it's the case then I have no word lol). Then come the latest chapter when we have a meeting between Yuuna and Kiku. And it ended with the start of a past, where it seems it was the start of the time they were dating. But it rubbed me in a wrong way cause it feels like they didn't even love each other. Iirc, Kiku fell in love with Sena shortly after their breakup. And like I said, Yunna just wants her own family with Sena in it, so when she noticed Sena's distance, she knew something wasn't right. Maybe she thought Sena wanted a "normal" family? That's why shortly after they were back to being best friends. And here is where I really don't like Yuuna. It feels like she just wants to do things that will be convenient for her.

Seems the previous chapter is the only actual bright chapter. And no, I didn't enjoy it in the slightest like the author wanted to.

I really like this series so I skimmed through the raws. And while I can't understand anything, it seems that it took 60+ chapters for the main couple to freaking finally hold hands. Also there seems to be an unexpected relationship between Himawari (Yurika's ex) and Ayame sensei.

Hello but where is the angst tag?

Made an account just so I can say I got pissed off reading this series. Even the "happy" ending didn't make me feel better. Maybe because it got axed but in the end, Sei is still the same. "Yoru and Aya are equally important", don't make me laugh. Who knows if she will just end up seeing Yoru again and leave Aya behind? And author, you already made Sei keep living in the past, now isn't Aya kinda the same? Like Sei is her only option, Sei needs her, she has to stay, she just can't move on. Man, now I really wish there is another epilogue or something where they broke up, and Aya finally found someone that wholeheartedly love her, than this awful woman. The girl is just only 18 for fk sack.

So yeah, what I got from this series is two girls made each other a mess of a human, and even after becoming adults, those terrible beings made a whole new mess for other young girls too.