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Kaichu is a dating sim about kaiju! You play the role of Gigachu, a gigantic romantic looking for love. Meet six other eligible kaiju and visit twenty-four famous landmarks where Gigachu will answer challenging compatibility questions to decide the fate of your relationship.

Don't worry if you're new to romance or don't speak any love languages because kaiju are notoriously non-verbal. Kaichu's two news anchors will interpret and report on the destructive courtship dance. Through the reporters’ expert analysis, the player learns about the preferences of the kaiju and apply that knowledge during each date’s relationship quiz to progress the story.