Casual Tag

Maybe I'm missing something but I can't find a good way to filter the site for the following:
- friends, or acquaintances, having consensual sex with minimal to no romance

Examples:
https://www.fakku.net/hentai/from-friends-english
https://www.fakku.net/hentai/senpai-english-1507316197
https://www.fakku.net/hentai/landlord-lady-english
https://www.fakku.net/hentai/systematic-girl-english
https://www.fakku.net/hentai/wakey-fuckey-english

What do folks think about having a tag for this?