Mystical Crash in Magical Middle Ages: Adventure of Valkyrie

A guy named Dimon, the main character of this game, inexplicably got into the magical Middle Ages and was forced to disguise himself as a valkyrie - a warrior girl Diana). What awaits him, will he be able to understand what happened, return home or stay in the magical world. Is he still he, or maybe she, or something else? What adventures are waiting for the character? All or almost all actions and their consequences depend on the player.