Lemme try rewriting that with just the essential info: Boshi Koukan was already pretty concise,

Boshi Koukan follows the story of two high school friends, Yuki and Haruto, who find themselves entangled in an unusual situation when they accidentally swap bodies. As they navigate their new identities, they discover more about each other’s lives and secrets. Yuki, now in Haruto’s body, experiences the challenges of being a boy, while Haruto, in Yuki’s body, deals with the complexities of being a girl. Their friendship deepens as they help each other adapt, leading to unexpected feelings and moments of intimacy. The story explores themes of identity, understanding, and the bonds that tie them together.