So, just read Yuri Project's ch.5 release (on their home page). Kinda have to say that all the criticism of Mei (like calling her 'cold' and shit) is totally uncalled for. You know that the way Momokino came onto her partway through the chapter could pretty much be called rape/sexual assault, right. Same thing with Yuzu pushing her down at the end of chapter 4. Basically the reason Mei was frustrated/being standoffish with Yuzu was because she was tired of being looked at as primarily a sexual object (i.e. Yuzu was acting pretty much just like Momokino). It's pretty clear to me that Mei is open to being with Yuzu eventually, but not without overcoming her issues and establishing their emotional connection first.
As for why Mei is more open to Yuzu versus Momokino, part of it is the sincerity Yuzu has shown in trying to stand by her and be a good sister to her (settling the issue with the fiance/teacher and saving her grandfather, for example), and the other is that Mei realizes she is partly responsible for Yuzu's feelings thanks to her actions at the start of the series (kissing/assaulting Yuzu a couple times) herself. Momokino's clingy behaviour/sexual interest, by comparison, is purely self-interested.
Below is ch. 6 stuff since I went and read YuriProject's preview version after seeing the stuff in this thread:
About Mei's relationship with her father, maybe there was some significant reason for him taking off to random other countries 7 years ago, but I think Mei's issue is simply insecurity that he doesn't care about her since he's been away for so long. Because she's afraid to know what he thinks of her, she hasn't been reading his letters/otherwise trying to interact with him which would be the first step in improving their relationship in the first place.
Yuzu's impression that what Mei wants/needs is the emotional support of a family isn't quite wrong, but she's still jumping to the wrong conclusion that that means she and Mei can't be lovers. After all, in the end a genuine lover/partner is family too.
I really dig the pseudo-incest undertones in the series, lol. The kinky, sometimes nonsensically smutty progression of this series is great. I think that's the primary merit Yuzu's POV brings to the story, since other times she comes off as just way too insensitive and careless. Regardless, Mei and Yuzu have some seriously great chemistry, and that's what's keeping me reading and interested right now.
last edited at Oct 10, 2013 6:13PM