Bakuman 3:

Oh, she's in there too hmm? I thought I heard her in another show from this season, but I didn't bother to look it up.

Ore no Imouto 3:



Yosuga no Sora 3:

I haven't seen the episode yet. I've only read what others have said about it. The reason ren'ai game anime often have that pattern is because they're trying to fit in as many girl's stories as possible. In the game there's usually only one or two girls per storyline (two of them if there's a love triangle). Usually you're only dealing with one girl only romantically per storyline. But the anime usually wants to show more than one storyline so they usually do the different girl's storylines in stairstep fashion and they usually stop at the point where the romance starts to build up too much where it would be too difficult to switch over to the main girl's storyline. If you wanted to see the full storylines of all the female characters you would have to play the game.

Sometimes the girl's stories that start earlier are the ones that have to move away or get taken out one way or another.

Lol...I didn't know there were so many viola jokes. I've got a violin, but it just sits around unused.