Also, fan service is when we like to see good looking people doing good looking things. It's a service for us fans that is usually shortened to "fan service" - because you wondered in your authors note. All the scenes with the characters with their shirts off in the series toy complex were classified as "fan service"- as were the love or sex scenes.
Tell your editor we would like more risqué scenes, please. (I saw at least one other person who thought so and I know you wanted to put more in.) We looked for mature for a reason, so just post the age rating before hand and we're good. (meanwhile thanks for what you were able to do. Tender love is the best.) p.s. There seem to be WAY more LBG webtoons rated mature (at least on here when I wrote this comment) so I'm glad there was at least one wholesome, mature rated, man-woman (that didn't have rape, cheating, drug inducement, polygamy or polyamorous based promiscuity, or other stuff like that). Why they gotta put that in all the time? I'd like to see more of your kind of work and so far this is the only one I've found. Yuna may come on a bit strong (she needs self control, and better understanding of how to read the room, granted), but she's not actually dangerous or two-faced, so thanks for that.