Traveling to Another World and Being Forced to Become a Son-In-Law

(Ship girl, son-in-law, chat group, join the organization that defends China) The special forces retired due to injury, because a game implemented two-way time travel, but found that he was not the protagonist? In a group chat, everyone has a system. His system can summon female weapon spirits and battleships of famous weapons in history. However, why is this lottery more cheating than penguins? Later, he was forced to become a son-in-law, but he discovered that there would eventually be a battle between the two worlds. He joined the Great Wall Organization of China, and he discovered that his gay friend was actually the superior of his superior. Under the advent of countless evil gates, how would he and the Great Wall of China fight?