Yui-chan-sensei is a charming high school teacher—so charming that her students are always coming to her for advice on sex! But it seems that she has a secret...? Follow Yui-chan-sensei's and her students' school lives while learning about sex in this very lewd, yet very educational comedy!

Suzuki Ryuto is an introverted, timid college student. Every day he puts on a fake smile, trying his best to blend into a group of outgoing students even despite cruel teasing over his virginity. One day he comes to a drinking party where he meets a beautiful girl, Kokoa. Per her request, he pretends to be her boyfriend to ward off the stalker who has been harassing the girl. Their tender love lead to great tragedy.

16-year-old shut-in Yoruhiko's twin sister, Akane, ends up in a coma after getting into an accident. Not wanting to ruin her perfect attendance, Yoruhiko decides to continue her record by going to school in her place. But, in order to do so, he must disguise himself as her and attend an all-girls boarding school! How will former recluse Yoruhiko keep up his act when surrounded by his sister's friends and roommate?

A fantasy world filled with magic, and inhabited by fantastic races, just like any other... Or so it used to be. The dawning of the technological era has brought forth computers, phones, tablets, and even the Internet. Fantasia has become ever changed... That is, until a pair of siblings stumbled upon and mysterious sword...

Once upon a time, a Demon Lord lost his wife and was all alone. But due to an unexpected turn of events, he met a woman he fell in love with at first sight. She happens to be...a Hero's mother?!