There is no need to be formal with me. You may not know the person is much younger than you. Just address by their name or nickname for this community.
Heh, just a quick point; when someone says something like "keep up the good work kind sir!" or "good sir" or "good man" ...or something along those lines, it's not strictly informal. It's more like a friendly sign of respect that can be between friends or strangers. I know English isn't your first language so I thought I'd point that out.
Anyway, back on topic.
This would be my first Yuri show. It looks normal and sweet. When I think of yuri, I pictured this show to have an aggressive gal who is after this passive gal. Partly because of this theme in yaoi manga that I heard from my little sister and anime fans online that yaoi tends to have a aggressive guy and a passive guy.
I'm glad this show is normal. There are too many weird romantic shows out this season.
Well I'm halfway through episode 2 and it looks like there are at least two other yuri couples as well as the protagonists, so there are plenty of personalities. But yeah, the main couple are both shy and sweet, though one is more forward and open than the other.