Description from GANMA! :<br/>Yuusuke, a 7th grader, is interested in his friend's older sister for various reasons.<br/>The older sister, while a little strange, is a kind and caring girl.<br/>She's mysterious, but is popular with everyone.<br/>This is an ordinary comedy about Mayuri-san's mysterious everyday life.<br/><br/><a href="https://twitter.com/panzuban"><img src="https://i.imgur.com/dQCXZkU.png"> Author/Artist’s Twitter</a> (Though it seems they do not/have not posted much about this series)