One day, male university student Haruma suddenly develops a uterus! Worried for his future as a husband, he turns to the only one he can trust with this delicate issue, his long-time best friend Natsu, but what he's told in turn is: "Why not be the bride instead?"
Natsu's had a crush on Haruma for ages and takes the chance to sleep with him under the guise of examining this new womb, but soon things spiral out of control...

A seductive story about a longtime friend with an unrequited love and a clueless university guy who isn't very bright! Filled with tons of different positions, it goes from sex between friends under a flimsy pretense to an (almost) compelled impregnation when their love for each other gets out of hand! Please note that only the top gets a happy end this time around.