>>34144591>>34144605Akari, the protagonist of the last chapter. And it's not ambiguous, it's straight up said from the very beginning he has wanted to be a boy from the beginning but he has a nagging mother that forces him to use feminine speech patterns and wear girls clothing.
His plot is about how he hates cute things but at the end learns that cute a cool (in Japan cute almost exclusively refers to things for girls and cool for boys) are subjective and learns to appreciate things usually deemed cute. But he doesn't revert or changes his boy clothes or anything like that.