@Serenata
What series are you referring to actually?
At least for me, I haven't ran into any series which went 180 on me, except maybe shitsurakuen. The early content usually gives a good idea of what to expect, this is seeming like KinMoza tier. Don't take kissing too seriously when it's a device for something else.
Nevertheless, here yuri is defined as “the overdone affection between two girls peculiar to girls in puberty,” adding that it is “a limited-time pseudo love”
That's interesting, that sounds like a description of Class S. Got the sauce?