I Fell Into The Seam Of Siam

The male protagonist has a Siamese cat, whose eyes are somewhat unique. The left eye is as deep blue as the sea, and the right eye is as golden as a flare. On a summer afternoon, the male protagonist was awakened by a cat crawling on his body while taking a nap. He opened his eyes and looked at the cat, but was suddenly sucked into the crack in its eye. Inside, he was told that the past world could be chosen and the choice was irreversible. The male protagonist, through targeted training, ultimately chooses the Age of Discovery in the early 17th century, starting a story of business, adventure, and combat.