@ikun1216: I'm writing them as their current ages, which means in Japan it is totally legal for Yui to buy alcohol.
You may or may not want to read my first story in the perv:
http://forum.jphip.com/index.php?topic=34824.0 which is basically stuff that happens between the kiss at the end of chapter 4 and the start of this one, but it's really not important to the story, I just felt like writing it. Because I'm a perv. So be sure to enjoy my terrible writing there.
Yui opened her eyes, and took a couple of seconds upon seeing Sayaka's face to remember that she was staying at hers that night. Nothing to worry about. She did start to worry when she realised she was naked. And so was Sayaka. And their legs were tangled. And Sayaka's hand was on her shoulder.
Yui couldn't remember what had gone on last night, but she was sure it must have been more than just the kiss she remembered. She honestly hoped Sayaka wouldn't remember any more than she did. Carefully and quietly she got out of the bed, and went and had a shower, before getting dressed into the change of clothes she'd bought and quickly finding, without looking at them too closely, the clothes she'd been wearing and putting them away in her bag.
She went downstairs and sat watching television quietly. She honestly didn't want to stay until tomorrow like planned anymore, worried about the atmosphere between them being awkward, but she felt it would be worse to just leave without saying anything.
Sayaka came down, looking a little unsure of what to say, and made breakfast, while Yui sat trying to avoid talking about anything. They ate their meal in silence. Eventually Yui spoke up.
'I'm, going home.'
'Eh?'
'I can't stay here. It's awkward.' She didn't mean to say that last part.
'Well if you think it's so awkward, maybe you could either tell me what the hell happened, or talk about it, or try to work things out.'
'I'm sorry Sayaka, but I can't. I feel awful'.
Yui rushed upstairs, grabbing her bag, and left even as Sayaka begged her to stay at least so they could figure something out. She couldn't do it.
Returning home earlier than her parents expected, Yui sat in her room. She felt awful, thinking she must have forced Sayaka to do whatever they did, and not wanting to deal with whatever had happened when she still had feelings for Takahashi.
Yui didn't speak with Sayaka at all on sunday or monday, keeping to herself and only talking to Miyuki in class. She returned home and retreated to her room.
She only spoke to someone that night because her mother let Iwata Karen, a girl from class A who was actually too young for their year and had made it in by being especially talented in certain areas. Yui sometimes helped her with her work when she didn't understand it.
She tried to keep a happy facade up, while explaining to Karen how to do the work. However, she noticed Karen wasn't her usual cheerful self either. Eventually she decided she had to ask the girl what was wrong.
Karen tried to say something, but eventually just moved and tried to kiss Yui. Yui pulled away after only a second, but she was surprised by what had happened.
'I love you..Yui-san'
'Karen, I've seen you in class for a long time, and we both know that's not true. It's something to do with Sumire, yes?'
Sato Sumire was another girl in class A, who got along very well with Karen they all knew. It'd had been no secret anybody that Karen only had eyes for Sumire, but Sumire herself had never seemed to notice.
'I.. just don't know how to make her notice me.'
'You just have to go and try. Don't sacrifice something you could have out of fear.'
Karen left soon after, leaving Yui to think about her own words. Eventually she realised that even if she still had feelings for Takahashi, she could probably be happy with Sayaka. If she hadn't messed it up already.
She ran out of the house, and straight over to Sayaka's, stopping only to ask Sayaka's mother if she was upstairs. She ran into Sayaka's room.
'Yui?'
Before Sayaka could say any more Yui carefully, took her head and leaned in to kiss her. She broke it, and after a moment, Sayaka returned the kiss.
'I'm sorry I left.'
Sayaka's only response was to kiss her again.
I honestly have no idea how or when TakaYui will actually happen. Or how long SayaYui will last. I guess we'll find out together.