Contract Mecha Girls: I Coast to Victory in the Apocalypse

Global catastrophe strikes, ushering in the apocalypse. Mutated marine creatures come ashore and prey on humans. The population plummets, bringing humanity to the brink of extinction. To save themselves, the authorities launch the Light of Salvation Project and develop awakening serums. After awakening, women can transform into powerful combat mecha girls, while men awaken as commanders with the ability to pilot them. He Nan spends his entire fortune on an awakening serum for his fiancée of eight years, only to be betrayed. Just before dying, he finally catches the last break fate has to offer: the ability to forcibly form contracts with multiple mecha girls. From then on, he rises to the top...