Why Is the Sea So Salty? Because You City Folk Pee Whenever You Go Swimming!

Plot Summary

When a mysterious "alien" begins to haunt the local beach, rumors spread of someone who is offering a reward for capturing the problematic alien and bringing it back alive. Gintoki and his deadbeat friend Taizou Hasegawa, who are busy burning their last few bucks in the local pachinko parlor, decide to take up the task of capturing the alien in the hopes of earning some quick cash. Taizou teams up with Odd Jobs Gin as they set out to capture the alien, but there is a unusual twist in this task and the reward is even stranger!