Just Like Mona Lisa 2.

In this world, people are born without a gender. Hinase approaches their eighteenth birthday in a state that ends years earlier for most children. Their life remains divergent from high school peers. Since Shiori and Ritsu both confessed their feelings, confusion takes root because Hinase’s heart has begun to flutter – around their two childhood friends! With a body hinting at transformation, Hinase must decide who to give their heart to before it’s too late… What draws the line between friendship and romance?