http://www.dlsite.com/maniax/work/=/product_id/RJ042759.html

A group of girls who have all just turned 20 years old, and thus, are now fully legal Japanese adults.

I've liked this circle's work for awhile, I'm happy to be able to upload something from them. Even though the cocks really looks like beer bottles orgasming.

Then again, hey, look at the bright side - at least it's not the usual tetrispussy/tetriscock.

001: Title Slide (1120x840)
002: Disclaimers (1120x840)
003-017: Childlike-face, Short, Small-Breasted 20 Year-old (1120x840)
018-035: Tall, Sports Club Member, Small-Breasted 20 Year-old (1120x840)
036-060: Small-Breasted/Huge-Breasted Twin 20 Year-olds (1120x840)
061-076: Small-Breasted, Glasses-Wearing, Committee Chairwoman 20 Year-old (1120x840)
077: Title Slide (960x720)
078: Disclaimers (960x720)
079-093: Childlike-face, Short, Small-Breasted 20 Year-old (960x720)
094-111: Tall, Sports Club Member, Small-Breasted 20 Year-old (960x720)
112-136: Small-Breasted/Huge-Breasted Twin 20 Year-olds (960x720)
137-152: Small-Breasted, Glasses-Wearing, Committee Chairwoman 20 Year-old (960x720)

Errm... Beerbottled dick? O_o

Base +6, Suktar +6, observer1980 +21

The beer bottles are on purpose, the caption in each of the pictures where they're fucking one says "Alcohol from age 20 onward" since, as OP pointed out, 20 is when you're an adult and not a minor, and thus is the drinking age in Japan.

Base +8, ziggyb +7, observer1980 +21, UnknowDestroyer +7