I think that they are 18 but he made them look like children for some reason
Viewing post in Daily Lives of My Countryside comments
I looked and can't fine anything and dude open your eyes read the text like cmon the copium is crazy and I have to say this game is really high quality but that doesn't justify the childish characters.
If you do fine it somewhere saying their 18+ well dude its the same dilemma as the 1000 year dragon shit it's weird like dude they don't even looks like teens its that bad and I guess if they did look like teens that blurs the lines of being ok but personally I fine it still weird.