Otoko na no ni Shikyuu ga Deki Chatta!? ~Shin'yuu ni Soudan Shitara o Yomesan ni Sare Chaimashita~

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...