Kazusa is an adult (who looks just like a middle-schooler) that is coincidentally the new school doctor of the primarily female Wakabane Middle School! He knows everything about how the female body works, so...

The partner of a one-night stand makes a surprise appearance at school! Tsuroga Kyotsugu, a confident and handsome celebrity senior high student, makes straight-forward love moves on the boys' school infirma...

Thai & Chinese versions have Kagawa Shingo as the author. Japanese version has Gakkou no Kaidan Tokuhou as the author.