Hyena

Fuutarou Uesugi is a poor, antisocial ace student who one day meets the rich transfer student Itsuki Nakano. They argue but when Uesugi realizes he is to be her tutor, he tries to get on better terms. While trying to do so he meets four other girls.

Bua, a medical student from today’s 5G era, is mysteriously swept back to King Rama III's reign – the golden era of Thai traditional medicine. Immediately thrown into an unknown world where she finds allies and rivals, her modern ways inevitably clash with old traditions.