The time is the near future. Gene splicing has resulted in the birth of a new being.

This living plant has the ability to understand human language and bears an open, kind and sincere soul. The only problem is that it looks like a tangled mess of tentacles.

Genetic modification is declared a success, but unsure how to proceed, the father of this creation decides to hide it in society. Dubbed "Embryo-kun", the living plant is dispatched to a place where it may be allowed to survive... such as an all-girl school!

They don't mind! A man is a man, IS A MAN! So begins Embryo-kun's bizarre love life.