In the last episode in season 2, when the girl kissed Futarou in the cheek you could hear her grunt and it sounded a lot like how Yotsuba grunts. And there are a lot of other theories that also agree that Yotsuba is the girl who marries him.
In the last episode in season 2, when the girl kissed Futarou in the cheek you could hear her grunt and it sounded a lot like how Yotsuba grunts. And there are a lot of other theories that also agree that Yotsuba is the girl who marries him.
