>>2468383This describes it far better than I ever could
https://vndb.org/v28346They're not long and contain no sex or masturbation, just naked girls embarrassed. Have you played the 4H games before? The writer and main artist loves ENF and all their games feature it.
There are 3 main story 'chains' in the 4H games and one of the 4 scenarios in their 10th anniversary omake scenario uploaded here is unrelated to any of the 3 chains. It's a stand alone.
So Chain 1:
In some alternate universe to ours there used to be a bunch of schools across Japan that held 'Total Nude Scholastic's Week'. The purpose of which was to build trust in community, trust in each other, strength of mind, and strength of body. Basically if a bunch of nude kids walk to school each day for a week you really gotta put your faith in your community, right? You also have to overcome the embarrassment of being seen naked every day. So in the cellphone and internet age most schools have dropped their total nude scholastic weeks because they don't want all their students showing up on the internet naked. The first game has a girl going to the country to find out her backwoods school still does total nude scholastic's week and she has to go to school naked for a week but all the other games center around Nihon Daichi Academy in the heart of Tokyo.
Nihon Daichi Academy is an old, wealthy and proud school that refuses to give up naked week. They feel that without it students in other schools are growing weak. So despite being in the middle of crowded Tokyo they make their students go to school a whole week naked. They have students from Kindergarten to college and make all of them do naked week starting in kindergarten. Because all the older students are used to it all the games in the series feature transfer students.