This is basically, sex education for shonen readers. The story is pretty okay, nothing unique, just your usual high school settings as a background. The character is pretty varied, but since this manga tends to do something episodic, I can't really evaluate the side characters. Yui-chan-sensei, our main character, is a pretty interesting sensei at the very least. She's the sex education teacher, with lewd body that tends to make some nasty rumours spreading, yet she's very inexperienced about sex life. Let alone having sex, she's never even dating a guy because her past as a book nerd. Yet because her obsession with studying, shecan teach the students about healthy sex life at ease. I like Yui-sensei as a character, but it can be improved by a longer arc, that include recurring side characters. Overall, I enjoy reading this manga.

Also, beware of ecchi, obviously. Since almost every arc have something like delusion about the sensei doing something perv with the students, lol. ofc it's only a delusion made by the students, but just a warning if you aren't comfortable with it.