I Promised the Heroine, but It Turned Out to Be a Strange Invasion? !

After Luo Chen was reincarnated, he found that he had come to a world where women dominate everything. The birth rate of men is only one in 100,000. Moreover, men generally have extremely short lifespans and are weak and prone to illness. Until the year Luo Chen came of age, the childhood sweethearts who grew up with him suddenly told him...