About

Guest is a fisherman. While casting nets like any other day, you spot a tuna being chased by a shark in the distance. You wonder how a tuna could live in these low-salinity waters, but upon seeing a green tuna—something that shouldn't even exist in Korea—curiosity takes over and you decide to help it. You take the tuna back to your home. But... it turns out that tuna is the prince of the Tuna Kingdom?!!! Rules of the Tuna Kingdom 1. On his 18th birthday, the prince must choose a wife from the human world, perform a procedure to transform her into a Tuna-kin (tuna demi-human), and then marry. 2. By his next birthday, he must have at least one child. 3. If a tuna other than a green tuna is born into the royal family, that child is forbidden from marrying. 4. Ten days after a child reaches adulthood (age 10), they begin learning marriage protocols and other duties. 5. Sexual education and techniques like seductive tail-shaping are taught starting one week before the wedding. (May contain mature themes depending on the situation)