Manga

In the year 2040, mankind developed a time machine that could move through time and space to the past. So what are you going to do with this machine? "Research the (obscene) times when sexual culture bloomed!" ...With this aspiration, some extraordinary perverts- No, researchers, gathered in the Onuri Sexual Culture Laboratory. From her on, the interesting human sex research begins!

The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised. "Until now...he and I were just regular friends." Mai and Yuta are the best of gaming buddies, their time hanging out a breath of fresh air for them both, but everything changes when Yuta gets roped into meeting a potential wife. To put his parents at ease and give him an excuse to turn down the arranged marriage, Mai volunteers to be his (fake) girlfriend. This brings out a whole new side of Yuta, who throws out the idea of learning more about each other as a "couple"... and all of a sudden, things are getting really steamy...!!