This is the R18 version which includes adult sex scenes!

Transfer student Sonomiya Kazuki's secret is that he is the only non-ED student in the world. It is difficult to keep this secret in a school where more than 90% of the students are female, and a certain incident leads Kazuki to be noticed as special by Hime-no-senpai, a senior student who serves as his guide. "Hey Sonomiya-kun. Girls... are actually naughty, you know?" Once they were alone, Hime-no-senpai's eyes changed color. She takes off her clothes, breathing heavily, and comes at me with a lick of her tongue...